Notwithstanding any provision of AS 23.40.070 - 23.40.260 to the contrary, an agreement between the employer subject to AS 39.20.500 - 39.20.550 and an employee bargaining organization that does not contain benefit provisions at least as beneficial to the employee as those provided by AS 39.20.500 - 39.20.550 shall be considered to contain the benefit provisions of those statutes.