Md. Code Ann., Lab. & Empl. § 4-504

Subject to provisions concerning budgetary and fiscal procedures contained in the employer’s charter or, with respect to Charles County, local law, regulation, or policy, if ratified or approved by a legislative enactment of the employer, and if signed by the chief executive officer of the employer, a memorandum of understanding between the employer and an exclusive representative shall bind the employer for the period of time which is provided in the agreement.