Way to complicate things DVLA
The rules in the US (well, actually it's per state but most are similar) are actually similar but enforcement is simpler! Here, you get a registration sticker every year or two from the DMV (Department of Motor Vehicles) which is a state-agency (i.e. rules do vary a little per state). In my state there is no inspection, some have a safety inspection, and some have an emissions test (California and northeast states mainly). The tag is color coded, if you don't renew your tag it's obvious because they are the wrong color, you'll be pulled over sooner or later -- probably sooner -- and fined for expired tags. You may be able to get out of the fine by retroactively paying for current tags, depending on the state. Simple! If you don't drive on public roads, you won't be caught with an out-of-date tag, no paper work to file for "off road" vehicles, no mistakes.