All the noise made earlier this year about a number of iOS apps that alert drivers to DUI checkpoints got Apple's attention. The apps are now explicitly banned by Apple.
A change in the App Store Review Guidelines was spurred by a letter from four democratic U.S. senators addressing the issue. The senators specifically asked for the removal of apps that provide "a database of DUI checkpoints updated in real-time.
The change in the guidelines is in section 22.8 and reads as follows:
Apps which contain DUI checkpoints that are not published by law enforcement agencies, or encourage and enable drunk driving, will be rejected.
Source: PC World