; (2) has been isolated from all sources of hazardous liquid, natural gas, or other gas; and (3) (A) has been purged of combustibles and hazardous materials and maintains a blanket of inert, nonflammable gas at low pressure; or (B) has not been purged as described in subparagraph (A), but the volume of gas is so small that there is no potential hazard. (b) Rulemaking (1) In general Not later than 2 years after the date of enactment of the PIPES Act of 2019 , the Secretary shall promulgate regulations prescribing the applicability of the pipeline safety requirements to idled natural or other gas transmission and hazardous liquid pipelines. (2) Requirements (A) In general The applicability of the regulations under paragraph (1) shall be based on the risk that idled natural or other gas transmission and hazardous liquid pipelines pose to the public, property, and the environment, and shall include requirements to resume operation. (B) Inspection The Secretary or an appropriate State agency shall inspect each idled pipeline and verify that the pipeline has been purged of combustibles and hazardous materials. (C) Requirements for reinspection The Secretary shall determine the requirements for periodic reinspection of idled natural or other gas transmission and hazardous liquid pipelines. . (b) Clerical amendment The table of sections for chapter 601 of title 49, United States Code (as amended by section 105(b)), is amended by inserting after the item relating to section 60142 the following: 60143. Idled pipelines. . 111. Liquefied natural gas facility project reviews Section 60103(a) of title 49, United States Code, is amended— (1) by redesignating paragraphs (1) through (7) as subparagraphs (A) through (G), respectively, and indenting appropriately; (2) in the first sentence, by striking The Secretary of Transportation and inserting the following: (1) In general The Secretary of Transportation