Mich. Comp. Laws § 38.1421

Sec. 121. (1) For the purposes of this article, the words and phrases defined in sections 122 to 124 have the meanings ascribed to them in those sections. (2) Notwithstanding any other provision of this act, the Tier 2 plan under this article shall be implemented by the department as soon as administratively feasible but not later than January 1, 2011.