In the United States and Canada, expulsion criteria and process vary from state to state or province. Depending on local school board jurisdiction, approval from that school's local school board may be required before a student can be expelled, as opposed to a suspension, which may require approval from the principal or a school board member, including the superintendent. Students who have been expelled from the school face numerous restrictions, in which they are no longer eligible to attend or visit the school, and are also disallowed from attending or performing any activity with any students or staff who are active with the school. Students who breach an expulsion, which includes visiting the school they have been expelled from, or perform or attend any activity with any students or staff who are active with the school, will be arrested for, and charged with trespassing. Students are usually not expelled for academic violations such as plagiarism that would be punishable in college. However, in some jurisdictions such as California, vulgarity which is not defined anywhere within California law is enough of a reason for a student to be expelled from any school. "(Note: California statute has been indirectly invalidated by the Supreme Court in FCC v. Fox Television Stations, Inc. (2012).)"