The law, of course, doesn't go into effect until some Maryland Mogul certifies the technology to be reliable and "safe".
Buy the way, how long do you suppose the batteries will last?
Read the first sentence of the article - I think you're referring to New Jerseys' "smart gun" legislation. Unless I missed something this baby is in effect right now.
Guns manufactured prior to Jan 1 2003 are exempt, but once dealers run out of inventory at some point in the future, the only choice MD gun buyers have (in MD) will be used guns or new, compliant guns.