Wis. Stat. § 196.84
Under rules promulgated by the commission, a holding company, as defined in s. 196.795(1) (h) or a nonutility affiliate, as defined under s. 196.795(1) (j), shall compensate the commission for the cost of any increase in regulation of any public utility affiliate, as defined under s. 196.795(1) (L), which is with the holding company or nonutility affiliate in a holding company system as defined in s. 196.795(1) (i), if the commission determines that the increase is reasonably required in order for the commission to implement and enforce s. 196.795. Such compensation may not be recovered directly or indirectly from any public utility affiliate. The commission shall assess such compensation using the procedure prescribed in s. 196.85, except that no advance payment of a remainder assessment under s. 196.85(2) may be required for the first 2 fiscal years after November 28, 1985. No assessment may be made under this section against any holding company or nonutility affiliate for any time worked by any person under s. 196.795(10m) if the time is properly assessable for utility regulation under s. 196.85. For the purpose of calculating cost increases under this section, 90 percent of the cost increases determined shall be costs of the commission and 10 percent of the cost increases determined shall be costs of state government operations.
Wis. Stat. § 196.84