N.H. Rev. Stat. § 227-L:27
When the governor shall have executed said compact on behalf of this state and caused a certified copy thereof to be filed in the office of the secretary of state, as required by RSA 227-L, and said compact shall have been ratified by one or more of the states named in article II thereof in accordance with the constitution of such state or states of the United States or provinces of the Dominion of Canada, in accordance with the laws of Canada, then said compact shall become operative and effective as between this state and such other state or states of the United States or provinces of the Dominion of Canada. The governor is hereby authorized and directed, upon the execution of said compact by the governor and filing of the required copy thereof in the office of the secretary of state, to notify forthwith the governors of the said named states and the President of the United States, that the state on its part has ratified said compact; or in the instance of a province of the Dominion of Canada the proper officials of that province and that dominion through the United States Secretary of State. The original notice of ratification received from the governor or other duly authorized official of any state or province joining in said compact shall be filed with the official copy of said compact in the office of the secretary of state, and such notice, if any, as may be received from the President or the Congress of the United States, signifying the consent of the Congress to said compact, shall be filed in the same manner.
RSA 227-L:27
1995, 299:1, eff. Jan. 1, 1996.