Md. Code Ann., Elec. Law § 11-604

A certificate issued by the State Board to the Secretary and presiding officer of the United States Senate or to the Clerk and presiding officer of the House of Representatives of the United States under § 11–603(b)(1)(iii) and (iv) of this subtitle constitutes prima facie evidence of the right of the individual certified to be seated for office in the United States Congress.