Indiana Code Title 16. Health § 16-31.5-14-1

Sec. 1. The compact shall come into effect on the date on which the compact statute is enacted into law in the tenth member state.  The provisions, which become effective at that time, shall be limited to the powers granted to the commission relating to assembly and the promulgation of rules.  Thereafter, the commission shall meet and exercise rulemaking powers necessary to the implementation and administration of the compact.