Section 2(1)(g) in The Petroleum and Natural Gas Regulatory Board (Determining Capacity of Petroleum, Petroleum Products and Natural Gas Pipeline) Regulations, 2010
(g)"expansion of pipeline" means increase in the capacity of existing pipeline beyond its previously authorized capacity due to installation of additional facilities such as compression facilities, addition of compressor stations or loop lines or extension to new sources of gas to tap additional volumes etc. Expansion of pipeline may also include extension of the existing pipeline in either, direction as long as it increases the capacity of the pipeline and in that case it may be treated as expansion of the pipeline not extension;