PORTLAND, Ore. — The small Oregon city at the heart of a major U.S. Supreme Court ruling last year that allowed cities across the country to enforce homeless camping bans is facing a fresh lawsuit over its camping rules as advocates find new ways to challenge them.

A disability rights advocacy group has filed a new lawsuit to halt the city of Grants Pass from closing one of two sanctioned homeless camps and restricting the hours of the other. The suit is the first major case following last summer’s U.