Keep it in mind if you're heading to any competitions  in the state.

Edit with link to the particulars.

Thanks!  I usually try to avoid everything
in that state isn't western MD.

If I am reading this correctly, people are good until 3/1/23. If they extended the compliance date to next year, how can they bust you for it now?

From the link:

The bill extends the period to get any currently possessed unserialized guns into compliance to 3/1/23. Any unserialized gun manufactured after Oct. 22, 1968, must be inscribed by an FFL and registered by then in order to be possessed. Otherwise, they must be dispossessed or removed from the state by this date;