50 CFR § 29.62
What if I intend to conduct new operations or modify my pre-existing operations?
July 17, 2020
(a) You must obtain an operations permit before conducting operations that are begun after December 14, 2016 for those new operations in accordance with §§29.90 through 29.97, Operations Permit: Application, and all applicable requirements of this subpart.
(b) You must obtain an operations permit prior to modifying your pre-existing operations for that modification in accordance with §§29.90 through 29.97, Operations Permit: Application, and all applicable requirements of this subpart.