PORTLAND, Ore. -- The Oregon Court of Appeals has upheld the constitutional amendment banning gay marriage approved by voters in 2004.

The court rejected arguments by gay and lesbian couples that Measure 36 should be overturned because it amounted to a revision to state law rather than an amendment to the state constitution.

The amendment said that only marriage between one man and one woman shall be legally recognized in Oregon.

One of the gay couples says their attorneys plan to appeal the case to the Oregon Supreme Court.