(a) The Regional Administrator's written decision to adopt, reverse, or modify an NAO decision or revised decision pursuant to §906.17(c) is the final decision of the Department for the purposes of judicial review.

(b) If the Regional Administrator does not take action pursuant to §906.17(c)(1), NAO's decision issued pursuant to §906.15(a) or revised decision issued pursuant to §906.16(d)(2) or (e) becomes the final decision of the Department for the purposes of judicial review 30 days after service of NAO's notification under §906.17(a), or upon expiration of any stay issued by the Regional Administrator pursuant to §906.17(c)(2).

(c) The office that issued the initial administrative determination shall implement the final decision of the Department within 30 days of service of the final decision issued pursuant to §906.18(a), or within 30 days of the decision becoming final pursuant to §906.18(b), to the extent practicable.