Are you sure about that? I have not heard that, and it would seem to go against COMAR and the Code.
An out of stater is not purchasing, renting, or receiving a handgun, so no HQL should be necessary. Again, what is the penalty for failing to register when moving into the state?
You are right about not needing the HQL, but he does have to register his frearms. Here is the text:
5–143.
4 (A) (1) A PERSON WHO MOVES INTO THE STATE WITH THE INTENT OF
BECOMING A RESIDENT SHALL REGISTER ALL REGULATED FIREARMS WITH THE
SECRETARY WITHIN 30 90 DAYS AFTER ESTABLISHING RESIDENCY.