Wis. Admin. Code § PSC 103.05
(2) The remaining joint utility administrative and general expenses shall be apportioned on the basis of the average of the ratios which the amount of the following for each department bears to the total for all departments:
Gross operating revenue;
Utility plant in service;
Supervised operating expenses.
Supervised operating expenses includes total of accounts 401, operation expense, and 402, maintenance expense, less amount of general and administrative expenses to be allocated.
History: 1-2-56; am. Register, February, 1961, No. 62, eff. 3-1-61.