The secretary shall adopt rules and regulations for acceptance of persons into a licensed treatment facility. In adopting rules and regulations the secretary shall be guided by the following:

(1) If possible a person shall be treated on a voluntary rather than an involuntary basis.

(2) A person shall be assessed to determine the appropriateness of the treatment and shall receive treatment in the least restrictive treatment environment possible.

(3) A person shall not be denied treatment solely because such person has withdrawn from treatment against medical advice on a prior occasion or because such person has relapsed after earlier treatment.

(4) An individualized treatment plan shall be prepared and maintained on a current basis for each person.

(5) Provisions shall be made for a continuum of coordinated treatment services, so a person who leaves a facility or a form of treatment will have available other appropriate treatment.