Wis. Stat. § 50.13

If the department develops and provides a workshop or seminar relating to the provision of service by facilities, adult family homes or residential care apartment complexes under this subchapter, the department may establish a fee for each workshop or seminar and impose the fee on registrants for the workshop or seminar. A fee so established and imposed shall be in an amount sufficient to reimburse the department for the costs directly associated with developing and providing the workshop or seminar.