V7 > Codes and Regulations Gas appliance and connector installation MUST comply with all local codes and regulations including municipal and stet building codes, and to all local utility regulations. In the absence of local code, the installation must comply with the National Fuel Gas Code ANSI Z223.1/ PAN 54, and/or Natural Gas or Propane Installation Code, CSA B148.1. Contact your local gas company for details. 1.