14 CFR §161.107

1. (a)To be eligible to implement a Stage 3 noise or access restriction under this subpart, an airport operator shall have the restriction contained in an agreement as defined in § 161.101(b) of this part.
2. (b)An airport operator may not implement a restriction pursuant to an agreement until the notice and comment requirements of § 161.103 of this part have been met.
3. (c)Each airport operator must notify the Federal Aviation Administration of the implementation of a restriction pursuant to an agreement and must include in the notice evidence of compliance with § 161.103 and a copy of the signed agreement.