No day program may accept a person who has mental retardation, a related disability, head injury, or spinal cord injury for services other than those for which it is licensed. No program may serve more than the number of clients as provided on the license. An applicant for a license shall file an application with the department in a form and under conditions the department may prescribe. The license must be issued for up to three years unless sooner suspended, revoked, or surrendered. The license is not transferable and must not be assigned.