Wis. Admin. Code Public Service Commission PSC 2.09
Commission dockets are usually either proceedings or investigations. Rules provide for an "other dockets" category to cover the possibility that a matter will not properly constitute either a proceeding or investigation.
The issuance of a notice initiates a docket. In a proceeding, a notice of proceeding will contain the name or names of the parties. Usually, there will be only one party named in the notice, the person who requested the commission to conduct the proceeding. Other persons desiring to become parties will file requests to intervene, pursuant to s. PSC 2.21.