20 C.F.R. § 655.182
(c) Statute of limitations and period of debarment.
(d) Definition of violation. For the purposes of this section, a violation includes:
(1) One or more acts of commission or omission on the part of the employer or the employer's agent which involve:
(e) Determining whether a violation is substantial. In determining whether a violation is so substantial as to merit debarment, the factors the OFLC Administrator may consider include, but are not limited to, the following:
(5) Review by the ARB.