Md. Code Ann., Crim. Law § 5-614

(a) (1) Unless authorized by law to possess the substance, a person may not bring into the State: (i) 45 kilograms or more of marijuana; (ii) 28 grams or more of cocaine; (iii) any mixture containing 28 grams or more of cocaine; (iv) 4 grams or more of morphine or opium or any derivative, salt, isomer, or salt of an isomer of morphine or opium; (v) 1,000 dosage units of lysergic acid diethylamide; (vi) any mixture containing the equivalent of 1,000 dosage units of lysergic acid diethylamide; (vii) 28 grams or more of phencyclidine in liquid or powder form; (viii) 112 grams or more of any mixture containing phencyclidine; (ix) 1,000 dosage units or more of methaqualone; (x) 28 grams or more of methamphetamine; (xi) any mixture containing 28 grams or more of methamphetamine; or (xii) 4 grams or more of fentanyl or a fentanyl analogue. (2) A person who violates this subsection is guilty of a felony and on conviction is subject to imprisonment not exceeding 25 years or a fine not exceeding $50,000 or both.

(b) (1) Unless authorized by law to possess the marijuana, a person may not bring into the State more than 5 kilograms but less than 45 kilograms of marijuana.