; and (2) in subparagraph (C), by striking document and inserting environmental document . 109. Increased flexibility for Federal transmission financing (a) Transmission facility financing Section 50151(b) of Public Law 117–169 ( 42 U.S.C. 18715(b) ) is amended by striking designated by the Secretary to be necessary in the national interest under section 216(a) of the Federal Power Act ( 16 U.S.C. 824p(a) ) and inserting determined by the Secretary to be in the national interest . (b) Transmission facilitation program Section 40106(h)(1)(A) of the Infrastructure Investment and Jobs Act ( 42 U.S.C. 18713(h)(1)(A) ) is amended by striking is located in an area designated as a national interest electric transmission corridor pursuant to section 216(a) of the Federal Power Act 16 U.S.C. 824p(a) and inserting is in the national interest . 110. Establishment of transmission investment tax credit (a) In general Subpart E of part IV of subchapter A of chapter 1 of the Internal Revenue Code of 1986 is amended by inserting after section 48E the following: 48F. Qualifying electric power transmission line credit (a) Allowance of credit For purposes of section 46, the qualifying electric power transmission line credit for any taxable year is an amount equal to 6 percent of the qualified investment for such taxable year with respect to any qualifying electric power transmission line property of the taxpayer. (b) Qualified investment (1) In general For purposes of subsection (a), the qualified investment for any taxable year is the basis of any qualifying electric power transmission line property placed in service by the taxpayer during such taxable year. (2) Certain qualified progress expenditures rules made applicable Rules similar to the rules of subsections (c)(4) and (d) of section 46 (as in effect on the day before the date of the enactment of the Revenue Reconciliation Act of 1990) shall apply for purposes of this section. (c) Qualifying electric power transmission line property For purposes of this section, the term