The officer can try to pursue, but as soon as they radio that they have a vehicle failing to stop, the first question a supervisor will ask is “What is it wanted for?” If the answer is “traffic,” then the supervisor is most likely to order that officer to stop pursuing so as to not run afoul of Policy 1503.

This is why you see extremely selective enforcement of traffic and registration infractions. The drivers with egregious violations are not likely to stop. Those who do stop are the exception rather than the rule; and because they actually stopped, they are more likely to get a warning rather than a citation.