Section 2(1)(f) in The Petroleum and Natural Gas Regulatory Board (Authorizing Entities to Lay, Build, Operate or Expand Petroleum and Petroleum Products Pipelines) Regulations, 2010
(f)"extension of pipeline" means increase in length of pipeline in either direction for transportation of petroleum and petroleum products from an existing pipeline or branch line to another geographical location without increase in capacity of the pipeline as determine of by the Board under relevant regulations;