Md. Code, Criminal Law § 6–402

(a) A person may not enter or trespass on property that is posted conspicuously against trespass by:

(1) signs placed where they reasonably may be seen; or

(2) paint marks that:

(i) conform with regulations that the Department of Natural Resources adopts under § 5–209 of the Natural Resources Article; and

(ii) are made on trees or posts that are located:

1. at each road entrance to the property; and

2. adjacent to public roadways, public waterways, and other land adjoining the property.

(b) A person who violates this section is guilty of a misdemeanor and on conviction is subject to:

(1) for a first violation, imprisonment not exceeding 90 days or a fine not exceeding $500 or both;

(2) for a second violation occurring within 2 years after the first violation, imprisonment not exceeding 6 months or a fine not exceeding $1,000 or both; and

(3) for each subsequent violation occurring within 2 years after the preceding violation, imprisonment not exceeding 1 year or a fine not exceeding $2,500 or both.