Section 22-21A-8
Amendments.
The member states, by unanimous agreement, may amend this compact from time to time without the prior consent or approval of Congress and any amendment shall be effective unless, within one year, the Congress disapproves that amendment. Any state may join this compact after the date on which Congress consents to the compact by adoption into law under its state Constitution.
(Act 2013-420, p. 1672, §8.)