Ballot Measure 47 was an initiative in the U.S. state of Oregon that passed in 1996, affecting the assessment of property taxes and instituting a double majority provision for tax legislation. Measure 50 was a revised version of the law, which also passed, after being referred to the voters by the 1997 state legislature. Measure 47 was placed on the ballot by initiative petition by anti-tax activist Bill Sizemore and approved by voters in the November 1996 general election, with 704,554 votes in favor and 642,613 votes against.