If upon completion of an evaluation of a person under § 33-5-403 or § 33-5-408, the department determines that the person meets the standards in § 33-5-501, § 33-5-502, or § 33-5-503, the department shall attempt to develop a community-based services plan for the person for the purpose stated. The plan shall be for a maximum of two (2) years, and no person shall participate in the plan for more than two (2) years.