Federal appeals court upheld an Oklahoma voter - approved measure . The amendment would require Oklahoma courts to `` rely on federal and state law when deciding cases '' and `` forbids courts from considering or using '' either international law or Islamic religious law , known as Sharia , which the amendment defined as being based on the Quran and the teachings of the Prophet Mohammed . The measure would ban state judges from considering Islamic , international cases . Council of American - Islamic Relations says measure violated First Amendment rights . Legislator on possibility of judge factoring in Sharia law : ` ` It would ban anyone ''
Federal appeals court upheld an Oklahoma voter - approved measure . The measure would ban state judges from considering Islamic , international cases . Council of American - Islamic Relations says measure violated First Amendment rights . Legislator on possibility of judge factoring in Sharia law : ` ` It would ban anyone ''