Key legal question
Whether the contested UVEK decision was a challengeable substantive decision or merely an enforcement decision for worker-protection conditions.
Extracted holding
The challenged parts were largely enforcement measures based on a final earlier permit; substantive objections were therefore time-barred and excluded from review.
Extracted reasoning
A final, sufficiently specific decision can be enforced, but its legality cannot later be attacked through an enforcement decision. The later AWA letters mostly repeated or clarified earlier permit conditions and did not create new, independently challengeable obligations.