(a) The existence of any litigation on the validity of these regulations shall not affect the authority of the Agency to issue notices of noncompliance or to conduct subsequent administrative proceedings under parts 66 and 67.

(b) Failure of the Environmental Appeals Board or the Presiding Officer at a hearing to meet any of the time limits contained in this part 66 and part 67 of this chapter shall not affect the validity of any proceeding under these regulations.

(c) The filing of any petition for reconsideration under this part or part 67 or the institution of EPA review of a State determination under part 67 shall not toll the accrual of noncompliance penalties. The penalty will be calculated from the date on which the source owner or operator receives a notice of noncompliance.