...[W]e conclude that each of the state constitutional challenges to Proposition 8 advanced by petitioners and the Attorney General lacks merit. Having been approved by a majority of the voters at the November 4, 2008 election, the initiative measure lawfully amends the California Constitution to include the new provision as article I, section 7.5.
However, the court said the marriages of approximetly 18,000 same-sex couples shall remain valid.
Applying well-established legal principles pertinent to the question whether a constitutional provision should be interpreted to apply prospectively or retroactively, we conclude that the new section cannot properly be interpreted to apply retroactively. Accordingly, the marriages of same-sex couples performed prior to the effective date of Proposition 8 remain valid and must continue to be recognized in this state.
Proponents of equal marriage rights will rally at 5:30 PM at Westlake to protest the decision.