REGULATE PHARMACY BENEFITS MANAGER PRACTICES: managed health care plan [may] or a pharmacy benefits manager shall not adopt a gag rule or practice that prohibits a health care provider from discussing a treatment option with an enrollee even if the managed health care plan or pharmacy benefits manager does not approve of the option. managed health care plan or a pharmacy benefits manager that proposes to terminate a health care provider from the managed health care plan or pharmacy benefits manager shall explain in writing the rationale for its proposed termination and deliver reasonable advance written notice to the provider prior to the proposed effective date of the termination.