On inspection of gas fittings of any building, the Gas Inspector shall leave a notice in the form of a tag or label attached to the gas pipe or building, when such work has been passed by inspection; and no person shall lath, seal floor or in any way conceal any piping until such tag or label has been attached thereto. The Gas Inspector must in all cases inspect all pipe work and connections of gas fittings within 48 hours of receipt of notice that the work is complete, tested and read for inspection.
(`85 Code, § 20-81)