Md. Code, Environment § 9–2203

(a) On or after July 1, 2020, a person may not sell or offer for sale in the State an expanded polystyrene food service product.

(b) On or after July 1, 2020, a food service business or school may not sell or provide food or beverages in an expanded polystyrene food service product.

(c) This section does not prohibit a person from storing a food service product for later distribution outside the State.