; and (2) repetition of the emergency brake signal transmission until it is received by the end-of-train device. 7. Confidential Close Call Reporting System Not later than 6 months after the date of the enactment of this Act, any Class I railroad that was ordered to pay the maximum civil penalty for any violation of a rail safety regulation set forth in section 5123(a) of title 49, United States Code, or in chapter 201, 203, 204, 205, 206, 207, 208, 209, or 211 during the 15-year period immediately preceding such date of enactment shall join and actively participate in the Confidential Close Call Reporting System (commonly known as C 3 RS ). 8. Required warning equipment and lookouts All railroads shall provide warning equipment to railroad watchmen and lookouts for roadway workers, which— (1) may include whistles, air horns, white disks, red flags, lanterns, and fuses; and (2) may not include the use of verbal warnings.