49 C.F.R. § 243.109
(a) Initial programs.
(b) Previously approved programs require an informational filing when modified. The employer must review its previously approved training program and modify it accordingly when new safety-related Federal railroad laws, regulations, or orders are issued, or new safety-related technologies, procedures, or equipment are introduced into the workplace and result in new knowledge requirements, safety-related tasks, or modification of existing safety-related duties. An employer that modifies its training program for these described reasons shall submit an informational filing to the Associate Administrator not later than 30 days after the end of the calendar year in which the modification occurred, unless FRA advises otherwise to individual employers, one or more group of employers, or the general public. Programs modified in accordance with this paragraph, after the initial FRA approval, are considered approved upon being modified and may be implemented immediately. Any program deficiencies noted by the Associate Administrator shall be addressed in the same manner as paragraph (a)(2) of this section. The filing shall contain a summary description of sufficient detail that FRA can associate the changes with the employer's previously approved program, and shall include:
(d) Additional submission, resubmission, or informational filing requirement for railroads.
(1) Each railroad shall:
(2) Not later than 90 days from the date a railroad files its submission, resubmission, or informational filing required pursuant to this section, a representative designated by the president of each labor organization that represents railroad employees subject to this part, may file a comment on the submission, resubmission, or informational filing: