Md. Code, Bus. Occ. & Prof. § 12-205

(a) The Board may adopt regulations to amend the State Plumbing Code. (b) (1) The Board may adopt, as part of the State Plumbing Code, regulations to carry out the purposes of and to enforce §§ 12–605 and 12–606 of this title. (2) The Board may adopt standards of the American National Standards Institute or any other nationally recognized organization. (3) The Board shall adopt, as part of the State Plumbing Code, regulations to carry out the purposes of and to enforce §§ 12–605.1 and 12–605.2 of this title. (c) (1) At least once a year, the Board shall review: (i) new and existing standards of the American National Standards Institute and any other organization listed in the State Plumbing Code or the Model Performance Building Code for water conserving appliances, devices, fittings, and fixtures; and (ii) the availability and cost of water conserving appliances, devices, fittings, and fixtures that conform to the standards. (2) If the Board finds that a water conserving appliance, device, fitting, or fixture that conforms to the standards of the American National Standards Institute or any other organization listed in the State Plumbing Code or the Model Performance Building Code is readily available at reasonable cost, the Board shall amend the State Plumbing Code to: (i) incorporate the standards for and require use of the water conserving appliance, device, fitting, or fixture; and (ii) require the use of a water supply system and a drainage and venting system that are designed based on the hydraulic requirements of the required water conserving appliances, devices, fittings, and fixtures. (3) Notwithstanding the availability and cost of the appliance, device, fitting, or fixture, the Board may allow, under the State Plumbing Code, the installation of a water conserving appliance, device, fitting, or fixture that meets the standards of the American National Standards Institute or any other organization listed in the State Plumbing Code or the Model Performance Building Code, subject to the use of a water supply system and a venting and drainage system design based on the hydraulic requirements of the appliance, device, fitting, or fixture. (d) The Board shall: (1) periodically publish an updated version of the State Plumbing Code; and (2) make available on request of any person a copy of the State Plumbing Code for a reasonable fee.