An appeals court is scheduled to hear arguments Tuesday in Arizona Gov. Jan Brewer's bid to let police enforce a minor section of the state's 2010 immigration law that prohibits the harboring of illegal immigrants.

The harboring ban was in effect from late July 2010 until U.S. District Judge Susan Bolton ruled in September that it was trumped by federal law and barred police from enforcing it. Brewer has asked the 9th Circuit Court of Appeals to overturn Bolton's ruling.

Brewer's lawyers argue the ban doesn't conflict with federal policies, is aimed at confronting crime and that the law's opponents haven't shown they have legal standing to challenge the prohibition. The governor's attorneys also say there's no evidence that the ban has been enforced against any people or organizations represented by a coalition of civil rights groups that have challenged the law in court.

The coalition has asked the appeals court to uphold Bolton's ruling, saying the state law is trumped by a federal harboring law that leaves no room for state regulation. The coalition also argues that Bolton has repeatedly confirmed that it has standing to challenge the harboring ban.

Another federal appeals court has barred authorities from enforcing similar harboring bans in Alabama and Georgia.