Good news for many on this thread. A few pieces of info from an inside source. It is currently the understanding within MSP that the Grandfather clause applies to the 3/20 advisory. More specifically, pre 10/1 lowers may be SBR'ed under Form 1 without concern for OAL requirements. In addition, pre 10/1 Form 4 are good to go.
Need it in writing, or we will just assume it is April 1.