; and (II) not less frequently than once every 5 years. (iii) Context of review The Secretary may conduct a review under clause (i) or (ii) as an element of the inspection of the operator carried out by the Secretary. (iv) Inadequate programs If the Secretary determines that the documents reviewed under clause (i) or (ii) do not comply with the requirements of this chapter (including regulations to implement this chapter), have not been adequately implemented, or are inadequate for the safe operation of a pipeline facility, the Secretary may conduct proceedings under this chapter. . (b) Monitoring Section 60105(e) of title 49, United States Code, is amended— (1) in the second sentence, by striking A State authority and inserting the following: (2) Cooperation A State authority with a certification in effect under this section ; (2) by striking The Secretary and inserting the following: (1) In general The Secretary ; and (3) by adding at the end the following: (3) Audit program Not later than 2 years after the date of enactment of this paragraph, the Secretary shall— (A) revise the State audit protocols and procedures to update the annual State Program Evaluations carried out under this subsection and section 60106(d) to ensure that a State authority with a certification in effect under this section has the capability to sufficiently review and evaluate the adequacy of the plans and manuals described in section 60109(e)(7)(C)(i); (B) update the State Inspection Calculation Tool to take into account factors including— (i) the number of miles of natural gas and hazardous liquid pipelines in the State, including the number of miles of cast iron and bare steel pipelines; (ii) the number of services in the State; (iii) the age of the gas distribution system in the State; and (iv) environmental factors that could impact the integrity of the pipeline, including relevant geological issues