Md. Code, State Government § 10–124

(a) In this section, “business” means a trade, professional activity, or other business that is conducted for profit.

(b) (1) Before a unit adopts a proposed regulation, the unit shall evaluate whether the proposed regulation has any impact on businesses.

(2) To evaluate the impact, the unit shall:

(i) on the basis of the sizes of the businesses that the proposed regulation might affect, divide those businesses into any classes that the unit considers appropriate for the proposed regulation; and

(ii) particularly consider:

1. the costs that the proposed regulation would impose on each class; and

2. the difficulty of compliance for each class.

(c) On the basis of the evaluation, the unit may adopt 1 or more regulations that apply differently to classes of businesses.