14 CFR § 11.91
How does FAA inform me of its decision on my petition for exemption?
July 13, 2020
The FAA will notify you in writing about its decision on your petition. A copy of this decision is also placed in the public docket. We will include the docket number associated with your petition in our letter to you.
[Doc. No. FAA-2005-22982, 71 FR 1485, Jan. 10, 2006]