Md. Code Ann., Com. Law § 14-1308
A person may not sell any photographic film manufactured after July 1, 1977, except black and white film, unless the cartridge or roll of film is marked with sufficient processing instructions so that a commercial photographic processor can identify the required chemical and developing procedures.
Added by Acts 1977, c. 782, § 1, eff. Jan. 1, 1978. Amended by Acts 1978, c. 673, § 2.