I just read this post ( see below ) on the Maserati forum, but it transcends to our cars just as much, so FYI :
p.s since I've gotten a fix-it ticket while the car was parked in San Francisco which is notorious for issuing those kind of citations, I keep my tow hook adapted mount plate in the trunk and screw it in only while the car is parked in the city..
In Connecticut. the state police have a new electronic tool. If a car goes past them without a front <a class="" href="http://i.viglink.com/?key=13c69cd2fc165e682f699e273d90f7cd&insertId=fed8bb52a1cf5382406e738747c425c3&type=CD&mid=undefined&exp=60%3ACI1C55A%3A4&libId=jgwsiqum0100pqwa000DA522gfoo0&loc=http%3A%2F%2Fwww.maseratilife.com%2Fforums%2Fgranturismo%2F88833-front-plate-mistake-2.html&v=1&out=https%3A%2F%2Fwww.amazon.com%2Fs%2Fref%3Dnb_sb_noss%3Furl%3Dsearch-alias%253Dautomotive%26field-keywords%3Dplate&ref=http%3A%2F%2Fwww.maseratilife.com%2Fforums%2Fgranturismo%2F&title=front%20plate%20mistake%20-%20Page%202%20-%20Maserati%20Forum&txt=%3Cspan%3Eplate%3C%2Fspan%3E" title="Link added by VigLink">plate</a> or without a front <a class="" href="http://i.viglink.com/?key=13c69cd2fc165e682f699e273d90f7cd&insertId=fed8bb52a1cf5382406e738747c425c3&type=CD&mid=undefined&exp=60%3ACI1C55A%3A4&libId=jgwsiqum0100pqwa000DA522gfoo0&loc=http%3A%2F%2Fwww.maseratilife.com%2Fforums%2Fgranturismo%2F88833-front-plate-mistake-2.html&v=1&out=https%3A%2F%2Fwww.amazon.com%2Fs%2Fref%3Dnb_sb_noss%3Furl%3Dsearch-alias%253Dautomotive%26field-keywords%3Dplate&ref=http%3A%2F%2Fwww.maseratilife.com%2Fforums%2Fgranturismo%2F&title=front%20plate%20mistake%20-%20Page%202%20-%20Maserati%20Forum&txt=%3Cspan%3Eplate%3C%2Fspan%3E" title="Link added by VigLink">plate</a> that their scanner will read, the trooper will get an automatic alert on that car.
In Vermont, a car cannot go through yearly inspection without a front and rear <a class="" href="http://i.viglink.com/?key=13c69cd2fc165e682f699e273d90f7cd&insertId=fed8bb52a1cf5382406e738747c425c3&type=CD&mid=undefined&exp=60%3ACI1C55A%3A4&libId=jgwsiqum0100pqwa000DA522gfoo0&loc=http%3A%2F%2Fwww.maseratilife.com%2Fforums%2Fgranturismo%2F88833-front-plate-mistake-2.html&v=1&out=https%3A%2F%2Fwww.amazon.com%2Fs%2Fref%3Dnb_sb_noss%3Furl%3Dsearch-alias%253Dautomotive%26field-keywords%3Dplate&ref=http%3A%2F%2Fwww.maseratilife.com%2Fforums%2Fgranturismo%2F&title=front%20plate%20mistake%20-%20Page%202%20-%20Maserati%20Forum&txt=%3Cspan%3Eplate%3C%2Fspan%3E" title="Link added by VigLink">plate</a> and the plate cannot be covered in any way by a plate holder, even on its border.
On one of my other cars ( Vette ) I mounted a <a class="" href="http://i.viglink.com/?key=13c69cd2fc165e682f699e273d90f7cd&insertId=fed8bb52a1cf5382406e738747c425c3&type=CD&mid=undefined&exp=60%3ACI1C55A%3A4&libId=jgwsiqum0100pqwa000DA522gfoo0&loc=http%3A%2F%2Fwww.maseratilife.com%2Fforums%2Fgranturismo%2F88833-front-plate-mistake-2.html&v=1&out=https%3A%2F%2Fwww.amazon.com%2Fs%2Fref%3Dnb_sb_noss%3Furl%3Dsearch-alias%253Dautomotive%26field-keywords%3Dplate&ref=http%3A%2F%2Fwww.maseratilife.com%2Fforums%2Fgranturismo%2F&title=front%20plate%20mistake%20-%20Page%202%20-%20Maserati%20Forum&txt=%3Cspan%3Eplate%3C%2Fspan%3E" title="Link added by VigLink">plate</a> holder that can be snapped up in the typical vertical position when needed but also can be pushed down and rearward so the plate is underneath the car and not visible. Of course, that does require some ground clearance.
I was thinking on the last one if you could build a device with a remote you can use to pop up the plate, after you're pulled over and then say to the puzzled cop : " - Officer, obviously I have a front plate., so you must have just been imagining not seeing it .. tell me, have you had anything to drink today ?! " Eh, maybe not a good idea ..a sure way to get a ride in the patrol car, wearing handcuffs..