Each permit issued under either the Gas Resources Preservation Act or the Coal Conservation Act
For gas removal permits issued from <1985> through the 20th permit for 1986, numbering consists of a two- or three-letter code representing the name of the permittee, followed by two-digit year and a number (which starts at 1 for each permittee). Starting with permit no. 21 for 1986, all gas removal permits are numbered sequentially within each year and preceded by a two-letter code: GR (i.e. gas removal)
For ethane removal and coal permits, the permit no. is preceded by one of the following codes: ER (i.e. ethane removal), or C (i.e. coal)
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