Maryland Code, Criminal Law § 6-402

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

(2) paint marks that:

(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.