Md. Code, Pub. Safety § 10-210

(a) (1) A person may not manufacture or process fireworks in the State except in a fireworks plant of a licensee. (2) A person who violates this subsection is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 1 year or a fine not exceeding $1,000 or both. (b) (1) Unless otherwise authorized by law, a person under this subtitle may not manufacture: (i) 1.3 G fireworks other than rockets and Roman candles; (ii) fireworks commonly known as “flash and sound”; (iii) products utilizing potassium chlorate; or (iv) explosives. (2) Except as otherwise authorized under this subtitle or Title 11, Subtitle 1 of this article, a person may not store 1.3 G fireworks other than rockets or Roman candles. (3) A person who violates this subsection is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 1 year or a fine not exceeding $1,000 or both. (c) (1) A person who has been denied a license to operate a fireworks plant in the State or whose license to operate a fireworks plant in the State has been suspended or revoked may not operate that fireworks plant in the State. (2) A person who violates this subsection is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 2 years or a fine not exceeding $2,000 or both.