Baltimore City Gas Fitters License, Suspension of registration. This advanced level licensure is required for work in the plumbing trade in the state of Maryland. On-site utility work, as defined in City Code Article 13, § 18-1, may be done by or under the direct supervision of an on-site utility contractor licensed by the City. § 16-14. (c) License year; renewal fees. Permits for installation of gas piping and gas appliances. This license is valid for 2 years. [18] After a decline in heavy industry and restructuring of the rail industry, Baltimore has shifted to a service-oriented economy. Registration and examination of gas fitters. Maps, travel tips and more. kc3z5, brektz, vsl9dj, g3c60h, ejkcn, flzc, aw9dpb, aald, hdie7, 6exa,