This subpart supplements the procedures contained in Secs. 4.10 and
4.11 of part 4 of this title and states the rules of practice applicable
to hearings under section 4(c) of the Act to determine whether the
collectively bargained wages and/or fringe benefits otherwise required
to be paid under that section and sections 2(a)(1) and (2) of the Act
are substantially at variance with those which prevail for services of a
character similar in the locality, and/or to determine whether the wages
and/or fringe benefits provided in the collective bargaining agreement
were reached as a result of arm's-length negotiations.