Wyo. Stat. § 41-12-302: When binding; notice of ratification.

The said compact shall not be binding or obligatory upon any of the high contracting parties thereto unless and until the same shall have been ratified by the legislature of each of said states and approved by the congress of the United States, and proclamation thereof shall be made by the president of the United States upon receipt by him, from the governors of all the signatory states, of notice of ratification of such compact by the legislatures thereof. The governor of Wyoming shall give notice of the ratification and approval of said compact by the seventeenth Wyoming legislature to the governors of each of the remaining signatory states and to the president of the United States, in conformity with article XI of said compact.