Idaho Code § 67-7802aII

Each of the following states and provinces is eligible to become a party to this agreement: Alaska, Alberta, British Columbia, Idaho, Montana, Oregon and Washington. This agreement establishing the Pacific northwest economic region shall become effective when it is executed by one (1) state, one (1) province, and one (1) additional state and/or province in a form deemed appropriate by each entity. This agreement shall continue in force and remain binding upon each state and province until renounced by it. Renunciation of this agreement must be preceded by sending one (1) year’s notice in writing of intention to withdraw from the agreement to the other parties to the agreement.