Maryland Code, Public Safety § 12-706

(1) contains and uses a class I or class II substance or a substitute for a class I or class II substance, as defined in 42 U.S.C. 7671a, as a refrigerant; and

(2) is used for a household or commercial purpose, including an air conditioner, a refrigerator, a chiller, or a freezer.

(1) the refrigerant is designated as acceptable for use in accordance with 42 U.S.C. 7671k; and

(2) any appliance containing the refrigerant designated for acceptable use is installed and used in accordance with the safety standards and use conditions under 42 U.S.C. 7671k.