This summary is not the rule. The rule text controls.
If your case is in district or municipal court, the deadlines for filing certain post-trial motions are shorter than in other courts. Normally these motions have to be filed within thirty days, but in district or municipal court you only get fourteen days. The same shorter fourteen-day deadline applies to the sixty-day period that would otherwise give the court time to rule on the motion.
This matters because it affects when you can appeal your case. If you file one of these post-trial motions on time, the clock that counts down toward your deadline to appeal stops running. It stays stopped until the court makes a decision and denies the motion. Once the motion is denied, the appeal clock starts running again.
In short, this rule gives you less time to act if your case is in district or municipal court, but it also protects your right to appeal by pausing that deadline while your motion is still being decided.