15 C.F.R. § 970.213
After an application has been submitted to the Administrator, but before a determination is made on the issuance or transfer of a license, the applicant must submit an amendment to the application if required by a significant change in the circumstances represented in the original application and affecting the requirements of this subpart. Applicants should consult with NOAA to determine if changes in circumstances are sufficiently significant to require submission of an amendment. The application, as amended, would then serve as the basis for determinations by the Administrator under this part. For each amendment judged by the Administrator to be significant, he will provide a copy of such amendment to each other Federal agency and department which received a copy of the original application, and also will provide for public notice, hearing and comment on the amendment pursuant to § 970.212 . Such amendment, however, will not affect the priority of right established by the filing of the original application. After the issuance of or transfer of a license, any revision by the licensee will be made pursuant to § 970.513 .
15 C.F.R. §970.213