14 CFR §406.3

1. (a)The FAA will make decisions about license, permit, and payload actions under this subpart based on written submissions unless the administrative law judge requires an oral presentation.
2. (b)Submissions must include a detailed exposition of the evidence or arguments supporting the petition. Where an applicant must demonstrate an equivalent level of safety or fidelity, the applicant must make a clear and convincing demonstration.
3. (c)Petitions shall be filed as soon as practicable, but in no event more than 30 days after issuance of decision or finding under § 406.1.