23, United States Code. (C) $19,202,000 for carrying out section 404 of title 23, United States Code. (D) $105,000,000 for carrying out section 405 of title 23, United States Code. (b) Special rules for fiscal year 2021 (1) Federal share Notwithstanding sections 120, 405(b)(2), 405(c)(2), 405(d)(2) and 405(h)(2) of title 23, United States Code, the Federal share of activities for fiscal year 2021 carried out under chapter 4 of title 23, United States Code and section 1906 of SAFETEA–LU ( 23 U.S.C. 402 note) shall be 100 percent. (2) Period of availability Notwithstanding section 118(b) of title 23, United States Code, funds apportioned or allocated to a State in fiscal years 2017 and 2018 under sections 402 and 405 of title 23, United States Code, and section 1906 of SAFETEA–LU ( 23 U.S.C. 402 note), shall remain available for obligation in that State for a period of 4 years after the last day of the fiscal year for which the funds are authorized. (3) Maintenance of effort Notwithstanding section 405(a)(9) of title 23, United States Code, the Secretary may waive the maintenance of effort requirements under such section for fiscal year 2021 for a State, if the Secretary determines appropriate. Notwithstanding any other provision of law, this paragraph shall apply as if such paragraph was enacted on September 30, 2020. (4) In-vehicle alcohol detection device research In carrying out subsection (h) of section 403 of title 23, United States Code, the Secretary may obligate from funds made available to carry out such section for fiscal year 2021 not more than $5,312,000 to conduct the research described in paragraph (1) of such subsection. (5) Cooperative research and evaluation Notwithstanding the apportionment formula set forth in section 402(c)(2) of title 23, United States Code, and section 403(f)(1) of title 23, United States Code, $2,500,000 of the total amount available for apportionment to the States for highway safety programs under section 402(c)(2) of title 23, United States Code, for each of fiscal years