Regulations of Connecticut State Agencies
(a) Unless the standard code requires a more stringent type of construction, Type C construction shall apply to such sections as, at the time of construction, are within the limits of a city or borough, are under public highways or railroads or are within five hundred feet of any of the following:
(1) A place of residence;
(2) a building used for public gatherings;
(3) a school building, playground or building devoted to institutional uses, or
(4) a building devoted to a business in which more than three people are employed.
(b) A section of gas pipe line may be constructed in accordance with Type A or B of the standard code if permission of the commission is first obtained. Application to the commission for use of Type A or B standards shall be made by the company at least thirty days prior to construction which application shall provide information including maps and/or aerial photographs which will permit determination in the field of the location of the proposed pipe line to which Type A or B standards are to be applied.