Md. Code, Public Safety § 9–304

Each fast response residential fire sprinkler system installed shall:

(1) be designed and constructed in accordance with accepted engineering practices; and

(2) comply with standards and regulations developed and adopted by:

(i) the State Fire Prevention Commission;

(ii) a county fire chief;

(iii) a fire administrator with responsibility for code enforcement; or

(iv) in Baltimore City, the Chief of the Fire Department.