18 C.F.R. § 4.200

This part applies to any application for amendment of a license, if the applicant seeks to:

(a) Make a change in the physical features of the project or its boundary, or make an addition, betterment, abandonment, or conversion, of such character as to constitute an alteration of the license;

(b) Make a change in the plans for the project under license; or

(c) Extend the time fixed in the license for commencement or completion of project works.