Md. Code, State Finance and Procurement § 15–220

(a) Except for a contract claim related to a lease for real property, a bidder or offeror, a prospective bidder or offeror, a unit, or a contractor may appeal the final action of a unit to the Appeals Board.

(b) An appeal under this section shall be filed:

(1) for a protest, within 10 days after receipt of the notice of a final action; and

(2) for a contract claim, within 30 days after receipt of the notice of a final action.