27472 Federal Register / Vol. 64, No. 97 / Thursday, May 20, 1999 / Rules and Regulations

[FR Doc. 99–12588 Filed 5–19–99; 8:45 am] Global Positioning System (GPS) incorporate by reference two recently BILLING CODE 6560±50±P information to aircraft equipped to use revised FAA Advisory Circulars. The advanced landing systems in response Report and Order in this proceeding to a petition for rule making filed by the modified the Commission’s rules to FEDERAL COMMUNICATIONS Federal Aviation Administration (FAA). increase the safety and efficiency of COMMISSION This R&O also allows the use of hand- aircraft navigation and movement of held radios for direct communications aircraft in and around airports. 47 CFR Parts 17 and 87 between ground service personnel and 4. The public interest is served by flight crews on frequencies allocated to modifying our rules to permit the [WT Docket No. 96±211, FCC 99±40] the Aeronautical Enroute Service in operation of aeronautical advisory Use of 112±118 MHz for Differential response to a petition for rule making stations (unicoms) in an unattended, Global Positioning System (GPS) filed by Aeronautical Radio, Inc. automated mode, allow aeronautical Correction Data and the Use of Hand- (ARINC). Finally, this R&O updates part ground stations to transmit differential Held Transmitters on Frequencies in 17 of our rules to incorporate by GPS augmentation data to aircraft, allow the Aeronautical Enroute Service reference two recently revised FAA the use of mobile radios for direct Advisory Circulars. The actions will communications between ground AGENCY: Federal Communications increase the safety and efficiency of service personnel and flight crews on Commission. aircraft navigation and movement of Aeronautical Enroute Service ACTION: Final rule. aircraft in and around airports. Further, frequencies and incorporate, by these amends should promote the use of reference, two FAA Advisory Circulars. SUMMARY: This Report and Order (R&O) new radio technologies beneficial to II. Summary of Significant Issues amends the Commission’s rules aircraft without allocating additional Raised by the Public Comments in regarding the use of 112–118 MHz for spectrum. Response to the Initial Regulatory differential Global Positioning System Administrative Matters Flexibility Analysis (GPS) correction data, the use of hand- held transmitters on frequencies in the Final Regulatory Flexibility Analysis 5. No comments were submitted in Aeronautical Enroute Service, and to direct response to the IRFA. We have, 2. As required by the Regulatory however, reviewed general comments update Part 17 of our rules to Flexibility Act, 5 U.S.C. 603 (RFA), incorporate by reference two recently that may impact small businesses. Initial Regulatory Flexibility Analyses 6. Much of the impact will be on revised FAA Advisory Circulars. These (IRFA) were incorporated in the Notice amendments were adopted in response small businesses that use, manufacture, of Proposed Rule Makings WT Docket design, import, or sell equipment, and to petitions for rule making filed by the 1 96–1 and WT Docket 96–211. The will increase safety and efficiency at Federal Aviation Administration and Commission sought written public the Aeronautical Radio, Inc. The effect airports by allowing new uses and comments on the proposals in the technologies for the purpose of of these amendments would increase Unicom NPRM and Aviation Safety aircraft and airport safety and facilitate communicating important information NPRM, including on the IRFA. The for flight and ground safety. the efficient use of aeronautical radio Commission’s Final Regulatory spectrum. Commenters submitted suggestions to Flexibility Analysis (FRFA) in this improve the technical and operational DATES: These regulations are effective Report and Order conforms to the RFA, criteria of the proposals. This Report May 20, 1999. The incorporation by as amended by the Contract With and Order directly benefits small reference of certain publications listed 2 America Advancement Act of 1996. businesses by providing smaller airports in the regulations is approved by the I. Need for and Objective of the that do not have sufficient resources to Director of Federal Register May 20, Proposed Rules staff a unicom station with an 1999. automated and economically viable FOR FURTHER INFORMATION CONTACT: 3. Our objective is to improve safety in air navigation by increasing pilots’ alternative to provide important James Shaffer of the Commission’s advisory information, providing airports Wireless Telecommunications Bureau at access to advisory information, promoting the use of satellite with satellite technology for the (202) 418–0680 or via email at precision landing of aircraft to facilitate [email protected]. technology for the precision landing of aircraft and allowing ground crews to approaches and landings in poor SUPPLEMENTARY INFORMATION: This is a communicate with aircraft on weather conditions, and improving the summary of the Commission’s R&O, aeronautical enroute frequencies, and to safe ground operations at airports and FCC 99–40, adopted February 25, 1999, improve the provision of services and and released March 3, 1999. The full 1 Amendment of Part 87 of the Commission’s supplies to aircraft on the ground. These text of this Report and Order is available Rules to Permit Automatic Operation of actions should increase the safety and for inspection and copying during Aeronautical Advisory Stations (Unicoms), WT efficiency of aircraft navigation and normal business hours in the FCC Docket 96–1, Notice of Proposed Rule Making, 11 movement of aircraft in and around FCC Rcd 1084 (1996), 61 FR 8905, (March 6, 1996), Reference Center, Room 246, 1919 M (Unicom NPRM); Amendment of part 87 to Permit airports. Street N.W. Washington, D.C. The the Use of 112–118 MHz for Differential Global III. Description and Estimate of the complete text may be purchased from Positioning System (GPS) Correction Data and the the Commission’s copy contractor, ITS, Use of Hand-held Transmitters on Frequencies in Number of Small Entities to Which the the Aeronautical Enroute Service and Amendment Rules Apply Inc., 1231 20th St. N.W., Washington, of Part 17 Concerning Construction, Marking, and D.C. 20036, telephone (202) 857–3800. Lighting of Antenna Structures, WT Docket No. 96– 7. The rules adopted in this Report 211, Notice of Proposed Rule Making, 11 FCC Rcd and Order will affect small businesses Summary of R&O 15391 (1996), 61 FR 60673, (November 29, 1996), that use, manufacture, design, import, 1. This R&O amends Part 87 of our (Aviation Safety NPRM). sell, or use aviation equipment designed 2 Public Law No. 104–121, 110 Stat. 847 (1996) rules to permit aeronautical ground (CWAAA). Title II of the CWAAA is ‘‘The Small for an automated unicom, a GPS stations to use frequencies in the 112– Business Regulatory Enforcement Fairness Act of augmentation system operating in the 118 MHz band to transmit differential 1996’’ (SBREFA), codified at 5 U.S.C. 601 et seq. 112–118 MHz band, and mobile radios

VerDate 06-MAY-99 16:02 May 19, 1999 Jkt 183247 PO 00000 Frm 00028 Fmt 4700 Sfmt 4700 E:\FR\FM\20MYR1.XXX pfrm08 PsN: 20MYR1 Federal Register / Vol. 64, No. 97 / Thursday, May 20, 1999 / Rules and Regulations 27473 used for direct communications manufacturers which are small the unit type accepted by the between ground service personnel and businesses.3 Commission under the technical criteria flight crews on Aeronautical Enroute set forth in the Commission’s Rules. In Estimates for Differential GPS Service frequencies. There are no order to have a unit type accepted, a Commission-imposed requirements, 10. Differential GPS is ground small entity would have to test the radio however, for any entity to use these reference stations licensed to private equipment and provide clerical support products. entities using unassigned VOR to file the requisite FCC application frequencies in the 112–118 MHz band to forms. Both of these functions could be Estimates for Unicoms transmit differential GPS augmentation handled by a third party. We estimate 8. The unicom service provides for data to aircraft to improve safety in that the initial cost to the manufacturer air-ground communications primarily approach and landing of aircraft. For the to meet this requirement, if done by a between general aviation aircraft and purpose of determining whether a third party, is $900 to test the airport facilities. Unicom transmissions licensee is a small business as defined equipment and complete the filing are limited to the necessities of safe and by the Small Business Administration information, and would require the expeditious operation of aircraft, (SBA), each licensee would need to be electronic engineering professional including runway conditions, types of evaluated within its own business area. skills. Additionally, there would be a fuel available, wind conditions, weather Additionally, there are small businesses $425 equipment authorization fee to file information, dispatching, and other that will manufacture, design, import, or the application for type acceptance. necessary safety information. Unicom sell equipment. We concluded that These costs are one time costs to type transmissions may include, on a these small businesses are classified in accept the equipment and assure that secondary basis, communications Communications Equipment, N.E.C., interference to other radio users is pertaining to the efficient portal-to- (Standard Identification Code 3669) as minimized. portal transit of an aircraft, such as entities employing less than 750 (2) In order to clarify the available ground transportation, food, employees as defined in 13 CFR responsibilities in operating unicoms, and lodging. Unicoms must provide 121.201. We invited comment on we require all unicom licensees at impartial information concerning whether this is the correct definition to airports having more than one unicom available ground services, and must use, but received no comment on this to jointly sign a letter of agreement, provide service to any aircraft station issue. The size data provided by the prior to the operation of a unicom in upon request and without SBA shows that 469 firms out of 498 automatic mode at such an airport, discrimination. For the purpose of firms in the Communications stating the name(s) of the licensee(s) determining whether a licensee is a Equipment, N.E.C. classification have who will control the automatic unicom small business as defined by the Small less than 750 employees but did not and, if applicable, how control of the Business Administration (SBA), each enable us to make a meaningful estimate automatic unicom will be divided. A licensee would need to be evaluated of the number of potential GPS copy of the agreement must be kept with manufacturers which are small within its own business area. each licensee’s station authorization. businesses.4 However, based on 9. Because the Regulatory Flexibility We estimate that approximately 50 information from the U.S. GPS Industry Act amendments were not in effect until licensees will require 0.7 hours to Council we estimate that this would the record in this proceeding was prepare and file the agreement required. include approximately 110 small closed, the Commission was unable to businesses that would be affected by V. Steps Taken by Agency To Minimize request information regarding the this proposed rule change. Significant Economic Impact on Small number of small entities that are Entities Consistent With Stated unicoms. Therefore, the Commission is IV. Description of Projected Reporting, Objectives unable at this time to determine the Recordkeeping, and Other Compliance 12. The rules would require number of small businesses which Requirements of the Rules differential GPS transmitters to be type could be impacted by the rules. 11. There are several reporting, accepted in accordance with the However, the Commission’s data recordkeeping, and compliance technical criteria set forth in part 87 indicates that there were 2775 unicoms requirements applicable to the subpart D of our rules, in lieu of the licensees operating at the end of October Commission licensees and equipment more exacting specifications contained 1996. Further, because any entity manufacturers. These new requirements in RTCA Document No. DO–217. This engaged in providing unicom service is are necessary to minimize flexible approach promotes eligible to hold a unicom license, these radiofrequency interference of the technological innovations in differential rules could potentially impact every equipment, and to specify the GPS equipment so long as such small business involved in aviation. responsibilities in operating unicom. equipment is compatible with the Additionally, there are small businesses (1) In order to facilitate operation of National Airspace System. Under our that will manufacture, design, import, or aviation equipment, these rules may present treatment of transmitters sell equipment. We concluded that have significant economic impact on a operating in the 108–137 MHz band, the these small businesses are classified in substantial number of small businesses. FAA is given a 21-day period to object Communications Equipment, N.E.C., Prior to marketing aviation equipment to any application for type acceptance (Standard Identification Code 3669) as in the U.S., a manufacturer must have that would adversely affect the entities employing less than 750 performance of the National Airspace employees as defined in 13 CFR 3 U.S. Small Business Administration 1992 System. The rules also take measures to 121.201. The size data provided by the Economic Census Industry and Enterprise Report, Table 1D, SIC Code 3669, (Bureau of the Census expedite coordination procedures SBA shows that 469 firms out of 498 data adapted by the Office of Advocacy of the U.S. between applicants, the FAA, and the firms in the Communications Small Business Administration). Commission concerning the assignment Equipment, N.E.C. classification have 4 U.S. Small Business Administration 1992 of a frequency and time slot for less than 750 employees but did not Economic Census Industry and Enterprise Report, Table 1D, SIC Code 3669, (Bureau of the Census differential GPS ground stations. In enable us to make a meaningful estimate data adapted by the Office of Advocacy of the U.S. order to reduce administrative burdens of the number of potential Small Business Administration). on both the public and the Commission,

VerDate 06-MAY-99 16:02 May 19, 1999 Jkt 183247 PO 00000 Frm 00029 Fmt 4700 Sfmt 4700 E:\FR\FM\20MYR1.XXX pfrm08 PsN: 20MYR1 27474 Federal Register / Vol. 64, No. 97 / Thursday, May 20, 1999 / Rules and Regulations we permit mobile units in the Federal Communications Commission. are mandatory. The Advisory Circulars aeronautical enroute service to operate Magalie Roman Salas, listed are available for inspection at the under the same authorization and call Secretary. Commission Headquarters in sign as the associated aeronautical Washington, DC, or may be obtained Rule Changes enroute station. This approach would from Department of Transportation, eliminate the need for aviation service For the reasons discussed in the Property Use and Storage Section, organizations to submit forms and fees preamble, the Federal Communications Subsequent Distribution Office, M483.6, to the Commission. These decisions Commission amends 47 CFR parts 17 Ardmore East Business Center, 3341 Q benefit small entities and give them an and 87 as follows: 75th Avenue, Landover, MD 20785, opportunity to provide telephone (301) 322–4961, facsimile recommendations to further improve the PART 17ÐCONSTRUCTION, (301) 386–5394. Copies are also impact and processes. MARKING, AND LIGHTING OF available for public inspection at the ANTENNA STRUCTURES Office of the Federal Register, 800 North VI. Report to Congress 1. The authority citation for Part 17 Capitol Street, Suite 700, Washington, 13. The Commission shall send a copy continues to read as follows: D.C. of this Final Regulatory Flexibility Authority: Secs. 4, 303, 48 Stat. 1066, PART 87ÐAVIATION SERVICES Analysis, along with the Report and 1082, as amended; 47 U.S.C. 154, 303. Order, in a report to Congress pursuant Interpret or apply secs. 301, 309 48 Stat. 3. The authority citation for Part 87 to the SBREFA.5 A copy of this FRFA 1081, 1085 as amended, 47 U.S.C. 301, 309. continues to read as follows: will also be published in the Federal 2. Section 17.23 is revised to read as Register. Authority: 48 Stat. 1066, 1082, as follows: amended; 47 U.S.C. 154, 303, 307(e) unless Ordering Clauses § 17.23 Specifications for painting and otherwise noted. Interpret or apply 48 Stat. lighting antenna structures. 1064–1068, 1081–1105, as amended, 47 14. Accordingly, it is ordered that, U.S.C. 151–156, 301–609. Unless otherwise specified by the pursuant to the authority of Sections Commission, each new or altered 4. Section 87.5 is amended by revising 4(i), 303(r), 307(e), and 332(a)(2) of the antenna structure to be registered on or the definition of ‘‘automatic weather Communications Act of 1934, as after January 1, 1996, must conform to observation station’’ to read as follows: amended, 47 U.S.C. 154(i), 303(r), 307(e) the FAA’s painting and lighting § 87.5 Definitions. and 332(a)(2), parts 80 and 87 of the recommendations set forth on the Commission’s Rules, 47 CFR Parts 17 structure’s FAA determination of ‘‘no * * * * * and 87 are amended as set forth in the hazard,’’ as referenced in the following Automatic weather observation Rule Changes, effective May 20, 1999. FAA Advisory Circulars: AC 70/7460– station (AWOS) or automatic surface 15. It is further ordered that these 1J, ‘‘Obstruction Marking and Lighting,’’ observation station (ASOS). A land proceedings are terminated. effective January 1, 1996, and AC 150/ station located at an airport and used to 5345–43E, ‘‘Specification for automatically transmit weather List of Subjects Obstruction Lighting Equipment,’’ dated information to aircraft. 47 CFR Part 17 October 19, 1995. These documents are * * * * * incorporated by reference in accordance 5. Section 87.131 is amended by Antenna, Aviation safety, with 5 U.S.C. 552(a). The documents adding a footnote to Aeronautical Communications equipment, contain FAA recommendations for advisory entry and adding to the end of Incorporation by reference, Radio. painting and lighting structures which the table, an entry for Differential GPS 47 CFR Part 87 pose a potential hazard to air to read as follows: navigation. For purposes of this part, the Aviation safety, Communications specifications, standards, and general § 87.131 Power and emissions. equipment, Radio. requirements stated in these documents * * * * *

Maximum Class of station Frequency Authorized band/frequency emission(s) 9 power 1

Aeronautical advisory ...... VHF ...... A3E 10 watts.10

******* Differential GPS ...... VHF ...... G7D Various.2 1 The power is measured at the transmitter output terminals and the type of power is determined according to the emission designator as fol- lows: (i) Mean power (pY) for amplitude modulated emissions and transmitting both sidebands using unmodulated full carrier. (ii) Peak envelope power (pX) for all emission designators other than those referred to in paragraph (i) of this note. 2 Power and antenna height are restricted to the minimum necessary to achieve the required service. ******* 9 Excludes automatic link establishment. 10 Power is limited to 0.5 watt, but may not exceed 2 watts when station is used in an automatic unattended mode.

6. Section 87.133 is amended by entry for Differential GPS to read as § 87.133 Frequency stability. adding to the table in paragraph (a) in follows: (a) * * * the (5) Band-100 to 137 MHz: entry, an

5 See 5. U.S.C. 801(a)(1)(A).

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Frequency band (lower limit exclusive, upper limit inclusive), and categories of stations Tolerance 1 Tolerance 2

******* (5) Band-100 to 137 MHz:

******* Differential GPS ...... 2

******* 1 This tolerance is the maximum permitted until January 1, 1990, for transmitters installed before January 2, 1985, and used at the same instal- lation. Tolerance is indicated in parts in 106 unless shown as Hertz (Hz). 2 This tolerance is the maximum permitted after January 1, 1985 for new and replacement transmitters and to all transmitters after January 1, 1990. Tolerance is indicated in parts in 106 unless shown as Hertz (Hz).

* * * * * its alphabetical order, an entry for G7D § 87.137 Types of emission. 7. Section 87.137 is amended by to read as follows: (a) * * * adding to the table in paragraph (a) in

Authorized bandwidth (kilohertz) Class of emission Emission designator Frequency de- Below 50 MHz Above 50 MHz viation

******* G7D ...... 14K0G7D ...... 25

*******

8. Section 87.139 is amended by must be attenuated below the mean symbol and class of station for DGP to revising the introductory text in power of the transmitter (pY) as follows: read as follows: paragraph (a), and paragraph (j) to read * * * * * § 87.171 Class of station symbols. as follows: (j) When using G7D for differential GPS in the 112–118 MHz band, the * * * * * § 87.139 Emission limitations. amount of power during transmission DGP—Differential GPS. (a) Except for ELTs and when using under all operating conditions when * * * * * single sideband (R3E, H3E, J3E), or measured over a 25 kHz bandwidth 10. Section 87.173 is amended by frequency modulation (F9) or digital centered on either of the second adding in numeric order the listing 112– modulation (F9Y) for telemetry or adjacent channels shall not exceed ¥25 118 MHz to read as follows: telecommand in the frequency bands dBm and shall decrease 5 dB per octave 1435–1535 MHz and 2310–2390 MHz or until ¥52 dBm. § 87.173 Frequencies. digital modulation (G7D) for differential 9. Section 87.171 is amended by * * * * * GPS, the mean power of any emission adding in its alphabetical order the (b) * * *

Class of sta- Frequency or frequency band Subpart tion Remarks

******* 112±118 MHz ...... Q DGP Differential GPS.

*******

11. Section 87.187 is amended by (y)(3) of this section, or for the control § 87.219 Automatic operations. revising paragraph (y) introductory text of airport lights on the following (a) A station operator need not be and the introductory text of paragraph frequencies: present when an automated unicom is (y)(4) to read as follows: * * * * * in operation. (b) Unicoms operating in an § 87.187 Frequencies. (4) Aviation support station automated mode must comply with the frequencies listed in § 87.323(b): * * * * * * * * requirements of paragraphs (1)–(5) of (y) Brief keyed RF signals (keying the * * * * * this section, in addition to the transmitter by momentarily depressing 12. A new § 87.219 is added to requirements applicable to non- the microphone ‘‘push-to-talk’’ button) Subpart G to read as follows: automated unicom operations. may be transmitted from aircraft for the (1) An automated unicom must control of automated unicoms on the transmit only in response to unicom frequencies listed in paragraph interrogating signals from aircraft,

VerDate 06-MAY-99 17:04 May 19, 1999 Jkt 183247 PO 00000 Frm 00031 Fmt 4700 Sfmt 4700 E:\FR\FM\20MYR1.XXX pfrm08 PsN: 20MYR1 27476 Federal Register / Vol. 64, No. 97 / Thursday, May 20, 1999 / Rules and Regulations including but not limited to the brief aeronautical enroute station. Mobile operator of an airport or to a person who keyed RF signals specified in units are further limited to operation on has entered into a written agreement § 87.187(y). the VHF frequencies listed in with the owner or operator for exclusive (2) An automated unicom must 87.263(a)(1). rights to operate and maintain the monitor the unicom frequency prior to (f) Mobile units licensed under station. Where applicable a copy of the transmission, and provide a brief delay paragraph (e) of this section shall not be agreement between the applicant and between the aircraft’s interrogating operated on air traffic control owner or operator of the airport must be signal and the automatic unicom’s frequencies, nor cause harmful submitted with an application. response. interference to, communications on air (c) Only one AWOS, ASOS, or ATIS (3) Automated advisory transmissions traffic control frequencies. will be licensed at an airport. must be as brief as possible, and must 14. Section 87.419 is revised to read 19. Section 87.529 is amended by never exceed one minute in length. as follows: revising the fourth and fifth sentences to (4) An automated unicom may not § 87.419 Supplemental eligibility. read as follows: provide weather information at an airport that has an operational, FAA- Only one control tower or RCO will § 87.529 Frequencies. certified, automatic weather facility, be licensed at an airport. ** * Normally, frequencies available 15. Section 87.475 is amended by unless the unicom itself is certified by for air traffic control operations set forth adding paragraph (e) to read as follows: the FAA. in subpart E will be assigned to an (5) If weather information is provided § 87.475 Frequencies. AWOS, ASOS, or to an ATIS. When a by an automated unicom: * * * * * licensee has entered into an agreement (i) weather sensors must be placed in (e) Frequencies available for with the FAA to operate the same order to adequately represent the differential GPS stations. Frequencies in station as both an AWOS and as an weather conditions at the airport(s) to be the 112–118 MHz band may be assigned ATIS, or as an ASOS and an ATIS, the served; to Special Category I (SCAT–I) ground same frequency will be used in both (ii) the weather information must be stations for differential GPS data links. modes of operation. proceeded by the word ‘‘advisory;’’ (1) The frequencies available are on (iii) the phrase ‘‘automated advisory’’ [FR Doc. 99–12173 Filed 5–19–99; 8:45 am] 25 kHz centers with the lowest BILLING CODE 6712±01±P must be included when the weather assignable frequency being centered at information was gathered by real-time 112.000 MHz and the highest assignable sensors or within the last minute; and, frequency being centered at 117.950 DEPARTMENT OF COMMERCE (iv) the time and date of the last MHz. update must be included when the (2) Applicants must coordinate a weather information was not gathered National Oceanic and Atmospheric frequency, time slot assignment, and Administration within the last minute. three-letter identifier with the FAA and (c) Only one automated unicom may provide this information to the 50 CFR Part 679 be operated at an uncontrolled airport. Commission upon application. Prior to the operation of an automated 16. Subpart S is amended by revising [Docket No. 990304062±9062±01; I.D. unicom at an airport with more than one the heading to read as follows: 051299E] unicom licensee, all of the licensees at that airport must sign a letter of Subpart SÐAutomatic Weather Fisheries of the Economic Exclusive agreement stating which licensee(s) Stations (AWOS/ASOS) Zone Off Alaska; Groundfish Fisheries control the automated unicom by Vessels Using Hook-and-Line Gear 17. Section 87.525 is revised to read in the Gulf of Alaska operations, and, if control is to be as follows: shared among several operators, how AGENCY: National Marine Fisheries that control will be divided or § 87.525 Scope of service. Service (NMFS), National Oceanic and scheduled. The original or a copy of the Automatic weather observation Atmospheric Administration (NOAA), letter of agreement must be kept with stations (AWOS) and automatic surface Commerce. each licensees’ station records. Within observation stations (ASOS) must ACTION: Closure. 90 days of the date upon which a new provide up-to-date weather information unicom operator is licensed at an airport including the time of the latest weather SUMMARY: NMFS is prohibiting directed where more than one unicom is sequence, altimeter setting, wind speed fishing for groundfish by vessels using authorized, and an automated unicom is and direction, dew point, temperature, hook-and-line gear in the Gulf of Alaska being operated, an amended letter of visibility and other pertinent data (GOA), except for sablefish or demersal agreement that includes the new needed at airports having neither a full- shelf rockfish. This action is necessary licensee’s signature must be signed or time control tower nor a full-time FAA because the second seasonal bycatch automated unicom operations must Flight Service Station. When a licensee mortality allowance of Pacific halibut cease. has entered into an agreement with the apportioned to hook-and-line gear 13. Section 87.261 is amended by FAA, an AWOS or an ASOS may also targeting groundfish other than sablefish adding paragraphs (e) and (f) to read as operate as an automatic terminal or demersal shelf rockfish in the GOA follows: information station (ATIS) during the has been reached. § 87.261 Scope of service. control tower’s operating hours. DATES: Effective 1200 hours, Alaska 18. Section 87.527 is amended by local time (A.l.t.), May 18, 1999, until * * * * * revising paragraphs (b) and (c) to read 1200 hours, A.l.t., September 1, 1999. (e) Mobile units may be operated as follows: under an aeronautical enroute station FOR FURTHER INFORMATION CONTACT: authorization so long as the units are § 87.527 Supplemental eligibility. Mary Furuness, 907–586–7228. limited to use at an airport and are only * * * * * SUPPLEMENTARY INFORMATION: NMFS used to communicate with aircraft on (b) Eligibility for an AWOS, an ASOS, manages the groundfish fishery in the the ground or the associated or an ATIS is limited to the owner or GOA exclusive economic zone

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