This notice proposes to revise the definition of the term "gathering line" so that the beginning and end of a gas gathering line are clearly described. The points where a gas gathering line begins and ends are confusing under the current definition. Identifying these points is important because gathering lines in onshore rural locations outside certain areas are not subject to the - Federal gas pipeline safety standards, while gas transmission and distribution lines in those locations are subject to the standards. The proposed definition of gathering line would include pipelines used to transport gas from the first production facility down stream from the well to the inlet of the first natural gas processing plant, the point of custody transfer of the gas, or the last point downstream where gas produced in the same or adjacent production fields is commingled. In addition, this notice proposes to define "production facility" and "production field."