The city of Santa Monica cannot prohibit certain kinds of private jets from using its airport. The U.S. 9th Circuit Court of Appeals left in place a preliminary injunction sought by the FAA in U.S. District Court last year. From the LAT:

Santa Monica has sought to prohibit jets with landing speeds of 138 mph to 191 mph from using the airport, which is near residential and commercial areas of the city. Though the fast jets have never crashed at the airport, municipal officials contend the aircraft are at risk of running off the runway and hitting nearby houses.