; (2) provide to Congress recommendations on any appropriate legislation to carry out the transfer under paragraph (1), including such appropriate enabling legislation as may be required by the articles of free association; (3) negotiate all matters pertaining to the government-to-government relationship between Puerto Rico and the United States through the development of the articles of free association, including foreign affairs, trade, finance, taxation, security, and defense, dispute resolution, immigration, economic benefits (including grants), and termination of the free association status; and (4) to the maximum extent practicable, complete the articles of free association not later than 2 years after the date of establishment of the constitutional convention. (e) Collaboration The Commonwealth government and Federal agencies shall collaborate with the Bilateral Negotiating Commission to provide for the orderly transfer of the functions of government as required by the articles of free association completed under this section. 312. Articles of free association approval, effective date, and termination (a) Approval The articles of free association completed by the Bilateral Negotiating Commission under section 311 shall take effect on mutual agreement between the Government of the United States and the Government of Puerto Rico after approval by— (1) a separate ratification vote on the articles of free association by the eligible voters in the special election held under section 304