In this subtitle the following words have the meanings indicated. “Employee” means a fire, EMS, paramedic, or rescue employee hired or compensated by the employer. “Employee organization” means any organization of employees that, as one of its primary purposes, represents fire, EMS, paramedic, or rescue personnel. “Employer” means: a charter county; Charles County; or a municipal corporation. “EMS” means emergency medical services. “Exclusive representative” means an employee organization that has been certified through an election of eligible employees to represent and bargain for those employees over any terms and conditions of employment.