Maryland Code, Insurance § 11-303

(a) Notwithstanding Subtitle 2 of this title, this subtitle applies to the establishment of rates for all types of insurance except:

(b) If and to the extent that the Commissioner finds that the application of any or all of the provisions of this subtitle is unnecessary to achieve the purposes of this subtitle, the Commissioner by rule may exempt a person or class of persons or a line or lines of insurance from any or all of those provisions.