No, major modifications will have limitations during the settlement window. They will only be available for stations identified as mutually exclusive (MX) in the public notice announcing the window. Major modifications in this context should solely serve the purpose of resolving mutual exclusivity issues.
The FCC exclusively entertains applications for new LPFM stations during specified filing windows. Prior to 2013, the previous filing window spanned between 2000 and 2001. The upcoming filing window is scheduled from November 1 through November 8, 2023.