The Secretary may promulgate such regulations as the Secretary determines to be appropriate to carry out the TIFIA program . (Added Pub. L. 105–178, title I, § 1503(a) , June 9, 1998 , 112 Stat. 249 , § 187; renumbered § 607 and amended Pub. L. 109–59, title I, § 1602(b)(5) , (d), Aug. 10, 2005 , 119 Stat. 1247 ; Pub. L. 112–141, div. A, title II, § 2002 , July 6, 2012 , 126 Stat. 620 ; Pub. L. 114–94, div. A, title II, § 2001(f) , Dec. 4, 2015 , 129 Stat. 1444 .) Editorial Notes Amendments 2015— Pub. L. 114–94 substituted “the TIFIA program” for “this chapter”. 2012— Pub. L. 112–141 amended section generally. Prior to amendment, section read as follows: “The Secretary may issue such regulations as the Secretary determines appropriate to carry out this chapter.” 2005— Pub. L. 109–59, § 1602(d) , renumbered section 187 of this title as this section. Pub. L. 109–59, § 1602(b)(5) , substituted “this chapter” for “this subchapter”. Statutory Notes and Related Subsidiaries Effective Date of 2015 Amendment Amendment by Pub. L. 114–94 effective Oct. 1, 2015 , see section 1003 of Pub. L. 114–94 , set out as a note under section 5313 of Title 5 , Government Organization and Employees. Effective Date of 2012 Amendment Amendment by Pub. L. 112–141 effective Oct. 1, 2012 , see section 3(a) of Pub. L. 112–141 , set out as an Effective and Termination Dates of 2012 Amendment note under section 101 of this title .