a contingency plan under which the State shall provide additional poll workers, machines, ballots, and other equipment and supplies (as the case may be) on the date of the election to any polling place used in an election for Federal office, including a polling place at which individuals may cast ballots prior to the date of the election, at which waiting times exceed one hour. (2) Approval of plan by Commission The State shall ensure that the contingency plan developed under paragraph (1) is approved by the Commission prior to the date of the election involved, in accordance with such procedures as the Commission may establish. (c) Effective date This section shall apply with respect to elections held on or after January 1, 2018. . (2) Clerical amendment The table of contents of such Act is amended— (A) by redesignating the items relating to sections 304 and 305 as relating to sections 306 and 307