20 Va. Admin. Code § 5-325-30
All operators, as defined in § 56-265.15 of the Code of Virginia, having the right to install underground utility lines, as defined in § 56-265.15 of the Code of Virginia, except interstate gas pipelines subject to regulation by the United States Department of Transportation, shall install such underground utility lines in accordance with the applicable standards as set forth in § 56-257 of the Code of Virginia in effect at the time of installation of such underground utility lines. If there is a conflict among any of the standards the most stringent standard shall be applied, unless the conflict can otherwise be resolved by the operators involved without violating applicable law or regulation. Reference to standards set out in § 56-257 of the Code of Virginia shall not change or extend their application but shall make them subject to enforcement by the commission as set forth in Part III (20VAC5-325-60 et seq.) of this chapter.
20 Va. Admin. Code § 5-325-30
Statutory Authority
§§ 12.1-13 and 56-265.15 of the Code of Virginia.