Md. Code, Env't § 9-205

(a) In this section, “authority” means a water, sewerage, or sanitary district authority. (b) This section applies only to any water supply system, sewerage system, or refuse disposal system that is for public use in this State. (c) Any authority or person who owns a water supply system, sewerage system, or refuse disposal system or who supplies or is authorized to supply water, sewerage, or refuse disposal service to the public shall submit to the Secretary: (1) A certified copy of the complete plans for the water supply system, sewerage system, or refuse disposal system that: (i) Is correct on the date of submission; and (ii) Is of the scope and detail that the Secretary requires; and (2) Any existing specifications of or reports on the water supply system, sewerage system, or refuse disposal system. (d) If plans do not exist or are of insufficient scope or detail, the authority or person who is required to submit the plans shall: (1) Prepare and submit to the Secretary new or supplemented plans; and (2) Make any investigation that is necessary to ensure that the new or supplemented plans are correct. (e) (1) The Secretary may request any other information about the water supply system, sewerage system, or refuse disposal system, including information or records on maintenance and operation, that the Secretary considers appropriate. (2) Any authority or person to whom a request is made under paragraph (1) of this subsection shall submit the information or records to the Secretary.