certificated natural gas
The term “certificated natural gas” means natural gas transported by any interstate pipeline in a facility for which there is in effect a certificate issued under section 7(c) of the Natural Gas Act [ 15 U.S.C. 717f(c) ]. Such term does not include natural gas sold to the user by the producer and transported pursuant to a certificate which is specifically issued under section 7(c) of the Natural Gas Act for the transportation of that natural gas, for such user unless such natural gas is used for the generation of electricity.