The Special Election Period (or SEP) for "Change of Residence" becomes available when the beneficiary is moving out of his/her Medicare plan's service area.
What is the timing of this Special Ele . . .
If you use a Special Enrollment Period to change Medicare Part D drug plans during the year, your drug purchase history moves with you to your new Medicare plan. So if you are in the Donut Hole and move to another Part D plan, most likely you will still be in the Donut Hole.