RATE RIDER “B” DISTRICT & MUNICIPAL PROPERTY TAX RIDERS

This Rider is applicable to Customers resident in municipalities receiving a property tax under the Municipal Government Act, R.S.A. 2000 c.M-26 or receiving payment for specific fees levied in connection with the installation, operation, and provision of gas distribution service to customers within the specified municipality. This Rider is the estimated percentage of delivery revenues required to provide for the tax payable or specific fees incurred each year. To the extent this percentage may be more or less than that required to pay the tax or specific cost, the percentage of distribution revenue in the Rider will be adjusted on an annual basis. The percentages are filed with the Utilities Commission.

Rate Rider “B” is to be applied as an addition to the total distribution billings calculated for the following areas:

District Property Tax Riders

District Rate (%) Effective Date Athabasca 2.3480% April 1, 2021 Barrhead, Westlock, Morinville 1.5364% April 1, 2021 Bonnyville 1.1366% April 1, 2021 Drumheller 0.2510% April 1, 2021 Grande Cache 0.0000% April 1, 2021 Hanna 1.0896% April 1, 2021 High Level 3.3571% April 1, 2021 Leduc 0.4128% April 1, 2021 Pincher Creek 0.5528% April 1, 2021 St. Paul 1.5487% April 1, 2021 Southeast 1.0273% April 1, 2021 Stettler 0.9937% April 1, 2021 Three Hills 1.1809% April 1, 2021 Two Hills 2.0953% April 1, 2021

Page 1 of 2 RIDER “B” Apex Utilities Inc.

RATE RIDER “B” DISTRICT & MUNICIPAL PROPERTY TAX RIDERS

Municipality-Specific Property Tax Riders (Incremental to applicable District Property Tax Rider)

Municipality Type District Rate (%) Effective Date Athabasca Town Athabasca 9.0000% April 1, 2021 Barrhead Town BWM1 1.9435% April 1, 2021 Beaumont City Leduc 1.0516% April 1, 2021 Bonnyville Town Bonnyville 1.6067% April 1, 2021 Summer Village Bonnyville 1.4124% April 1, 2021 Calmar Town Leduc 2.0684% April 1, 2021 Crystal Springs Summer Village Leduc 0.1871% April 1, 2021 Delia Village Hanna 3.0537% April 1, 2021 Donalda Village Stettler 2.7524% April 1, 2021 Drumheller Town Drumheller 2.1415% April 1, 2021 Elk Point Town St. Paul 2.3382% April 1, 2021 Glendon Village St. Paul 4.5341% April 1, 2021 Grandview Summer Village Leduc 0.2376% April 1, 2021 Grande Cache Hamlet Grande Cache 0.6147% April 1, 2021 Hanna Town Hanna 1.7816% April 1, 2021 High Level Town High Level 0.0137% April 1, 2021 Island Lake Summer Village Athabasca 1.0595% April 1, 2021 Leduc City Leduc 0.9507% April 1, 2021 Ma-Me-O Beach Summer Village Leduc 0.9160% April 1, 2021 Morrin Village Drumheller 1.7426% April 1, 2021 Morinville Town BWM 1.1687% April 1, 2021 Munson Village Drumheller 2.3712% April 1, 2021 Pelican Narrows Summer Village Bonnyville 0.5324% April 1, 2021 Pincher Creek Town Pincher Creek 1.8346% April 1, 2021 Summer Village Leduc 1.1760% April 1, 2021 Rochon Sands Summer Village Stettler 1.0893% April 1, 2021 St. Paul Town St. Paul 1.9103% April 1, 2021 Stettler Town Stettler 1.1920% April 1, 2021 Sunset Beach Summer Village Athabasca 1.1682% April 1, 2021 Three Hills Town Three Hills 1.1620% April 1, 2021 Two Hills Town Two Hills 3.1921% April 1, 2021 Waskatenau Village BWM 1.8906% April 1, 2021 Westlock Town BWM 2.2052% April 1, 2021 White Sands Summer Village Stettler 1.1291% April 1, 2021 Zama City Hamlet High Level 9.0000% April 1, 2021

1 BWM denotes Barrhead, Westlock, and Morinville.

Page 2 of 2 RIDER “B” Apex Utilities Inc.