Subpart D - Exemption of Natural Gas Service for Drilling, Testing, or Purging from Certificate Requirements Authority:Natural Gas Act, as amended, 15 U.S.C. 717 et. seq., Energy Supply and Environmental Coordination Act, 15 U.S.C. 791 et. seq., Federal Energy Administration Act, 15 U.S.C. 761 et. seq., Natural Gas Policy Act of 1978, Pub. L. 95-621, 92 Stat. 3350, Department of Energy Organization Act, Pub. L. 95-91, E.O. 12009, 42 FR 46267.