The main points:
(they don't say *when* in 2012)
On the selected date, analog LPTV licenses would be terminated and analog construction
permits would need to be modified to specify digital operation.
(They propose to require all LPTVs operating above 51 to submit an application to move below by June 30, 2011, and complete the move within the subsequent six months.)
Under the existing rules, a change is "minor" if there is any coverage overlap whatsoever between the existing and proposed new facilities.
Comments on the NPRM are due in a bit over 60 days.