Requiring that, on the termination of any health benefits contract that exists on July 1, 2018, a county, municipal corporation, or county board must enroll and participate in the State Employee and Retiree Health and Welfare Benefits Program; requiring the Program to encompass all units in all county governments, municipal corporations, and county boards; requiring the Secretary of Budget and Management to adopt certain regulations specifying certain employees who are eligible to participate in the Program with certain subsidies; etc.