The clock for a petition for fees under the statute starts with the final judgment, not with the subsequent final agency resolution.
https://www.cadc.uscourts.gov/internet/opinions.nsf/4D6C022174310506852582C600521ED6/$file/14-1022-1739804.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.