I live in Ontario Canada. In my own home, can I legally work on the NG lines? I have a NG fireplace that was removed so I could redo the base. The lines were capped and a valve installed and shut. Once the base is done, can I legally remove the plug, install the necessary lines to the same fireplace? FYI: I work in the Power engineering field, and at work, as long as there is no modifications, I can break lines and replace 1 for 1 all components.