Within 15 working days after receipt of -
(a) Notification that the employer intends to contest a citation or proposed penalty under section 10(a) of the Act, 29 U.S.C. 659(a); or
(b) Notification that the employer wishes to contest a notice of a failure to abate or a proposed penalty under section 10(b) of the Act, 29 U.S.C. 659(b); or
(c) A notice of contest filed by an employee or representative of employees under section 10(c) of the Act, 29 U.S.C. 659(c),
the Secretary shall notify the Commission of the receipt in writing and shall promptly furnish to the Executive Secretary of the Commission the original of any documents or records filed by the contesting party and copies of all other documents or records relevant to the contest.