Court has told probate judges to stop issuing same-sex marriage licenses . The Supreme Court's decision is a major victory for gay rights advocates who have been fighting the ruling in federal courts and state legislatures across the country. Federal justices ruled that banning gay marriage violates US Constitution . But court argues under Alabama law , marriage involves a man and woman . Six justices agreed in 134-page opinion on Tuesday , which was not signed . National Center for Lesbian Rights director described court 's position as 'unfortunate ' , adding 'it is determined to be on the wrong side of history '
Court has told probate judges to stop issuing same-sex marriage licenses . Claims previous federal ruling does not prevent it from following state law . Federal justices ruled that banning gay marriage violates US Constitution . But court argues under Alabama law , marriage involves a man and woman . Six justices agreed in 134-page opinion on Tuesday , which was not signed . National Center for Lesbian Rights director described court 's position as 'unfortunate ' , adding 'it is determined to be on the wrong side of history '