This article sets forth provisions enabling the commissioner to regulate and assure the consistent high quality of services provided within the state to persons suffering from chemical abuse or dependence, their families and significant others, and/or those who are at risk of becoming chemical abusers. The commissioner may adopt and promulgate any regulation reasonably necessary to implement and effectively exercise the powers and perform the duties conferred by this article. This article shall govern the operation of programs, provision of services and the facilities hereinafter described including those approved under the former article twenty-three and the former sections 31.15, 31.23 and 31.24 of this chapter, and the commissioner's powers and authority with respect thereto, and shall supersede, as to such matters, sections of the former article twenty-three and article thirty-one of this chapter that are inconsistent with the provisions of this chapter; provided, however valid certificates of approval and operating certificates previously issued under article twenty-three of this chapter or article thirty-one of this title shall remain in full force and effect but shall be subject to conversion upon subsequent review, subject to the provisions of subdivision (b) of section 19.40 of this chapter. Valid operating certificates previously issued under section 19.40 of this chapter shall remain in full force and effect and shall be deemed to be operating certificates issued under this article and will be converted to such operating certificates upon subsequent review, subject to the provisions of subdivision (b) of section 19.40 of this chapter. For purposes of this article, the term "commissioner" means the commissioner of the office of alcoholism and substance abuse services.