43 CFR §3137.111

If the unit operator requests it, the BLM will extend the primary term of all NPR-A leases committed to a unit agreement or renew the leases committed to a unit agreement if any committed lease within the unit is extended or renewed under § 3135.1-5 or § 3135.1-6. If the BLM approves a lease renewal under § 3135.1-6(b), the BLM will require a renewal fee of $100 per acre for each lease in the unit that is renewed.