If the director has reason to believe that a person licensed under this chapter has become unfit to practice massage/bodywork therapy or has violated a provision of this chapter or a regulation promulgated under this chapter or if a written complaint is filed with the director charging the licensee with the violation of a provision of this chapter or a regulation, the director shall initiate an investigation in accordance with procedures established by the department in regulation. If after investigation it appears that probable cause exists for a hearing, a time and a place must be set by the disciplinary panel for a hearing to determine whether disciplinary action must be taken against the licensee. Notice must be given and the hearing conducted in accordance with the Administrative Procedures Act.