Hardly bitter, Jim. But, there is no way to post any advice since there is no mention of the nature of the violation. Plus, absent a violation that involves a zip code or the year, make and model of the car, the year of the car and the zip code of the OP are not going to be elements of the offense. As such, those two items do nothing to determine guilt, and by themselves do nothing to establish reasonable doubt. (Not to mention that much of the time we get this information from the driver or from other documents - either of which could be incorrect.)
Now, maybe the OP's state of MD demands perfection in the citations - I don't know. I cannot find any links to indicate that the state requires such perfection, but I cannot guarantee that such absolute perfection is not required. Though, in our state of CA, the year of a car and the zip code of the defendant are not going to be part of the elements of any offense. the ONLY place it might even be an issue would be if the officer testified that he saw a "1993 Chevy Caprice ..." when it was, in fact, a 1995 ... even then, it's not likely to be an issue unless the officer testified to a number of such matters. This is why I always run with my first impression: "I observed a blue Chevrolet sedan ..." or some such thing. Since I cannot testify as to eyeballing the year, make and model of every car, I don't tend to testify to those things unless I add the caveat "... later determined to be a 1995 Chevrolet Caprice."
Until the OP posts the violation for which he (or she) was cited, we have no idea what suggestions might be made for a defense. However, as I have no idea of the traffic system in MD I may have little to add anyway. But, I think it is safe to say that zip codes and the year of the vehicle will be irrelevant t the offense or a defense. It might be an issue for a faulty complaint justifying a demurrer, but even that would be a stretch.
- Carl