A person assessed a civil penalty has 30 days from the date of the final administrative decision in which to make full payment of the civil penalty, or agree to a payment schedule. For the purposes of this subpart, the final administrative decision is:

(a) The final assessment of civil penalty if the person served with the final assessment does not file a timely request for hearing under § 49.535(a)(2).

(b) The administrative law judge's decision on the request for hearing if a timely appeal to the OHA Director is not filed under § 49.550(a); or

(c) The decision of the Ad Hoc Board of Appeals if a timely appeal of the administrative law judge's decision was filed under § 49.550(a).