Conservative religious and legal groups had asked the California Supreme Court to stop its order from becoming effective until voters have the chance to weigh in on the issue.

An initiative that would amend the state constitution to ban gay marriage has qualified for the ballot. Its passage would overrule the court's decision.

The Supreme Court says its ruling will be final at 5 p.m. on June 16.

Wednesday's denial clears the way for gays and lesbians in the nation's most populous state to get married starting June 17, when state officials have said counties must start issuing new gender-neutral marriage licenses.

In two decisions — one a 5-4 split, the other unanimous — the justices found that money laundering charges apply only to profits of an illegal gambling ring and cannot be used when the only evidence of a possible crime is when someone hides large amounts of cash in his car when heading for the border.

The government brings money laundering cases against more than 1,300 people annually and the justices appeared to agree with defense lawyers who said government prosecutors have been stretching the bounds of the law. The Justice Department drew little sympathy from Justice Antonin Scalia.

"The government exaggerates the difficulties" of enforcing a narrowed interpretation of money laundering, Scalia wrote in the gambling case involving an illegal lottery. Scalia drew the support of three other justices. The deciding fifth vote came in a separate opinion from a member of the liberal wing of the court, Justice John Paul Stevens. Stevens declined to go as far as Scalia did in rejecting the government's position.

In a unanimous decision, Justice Clarence Thomas said that a money laundering case cannot be proven merely by showing that funds were concealed while being transported.

In a 5-4 ruling, Justice Antonin Scalia said that money laundering refers to profits of an illegal operation, not gross receipts. The court's interpretation is a narrow one opposed by law enforcement agencies.

Scalia said the narrow definition will not unduly burden authorities, who must show only that a single instance of unlawful activity was profitable.

In the cases of Efrain Santos and Benedicto Diaz, a federal judge and the 7th U.S. Circuit Court of Appeals in Chicago said that paying off gambling winners and compensating employees who collect the bets don't qualify as money laundering. Those are expenses, and prosecutors must show that profits were used to promote the illegal activity, the appeals court ruled in a decision affirmed by the Supreme Court.

In dissent, Justice Samuel Alito said that the court's ruling would frustrate congressional intent and "maim" a law that was enacted as an important defense against organized criminal enterprises.

Without comment, the justices declined to hear the case involving a segment of the $1.5 billion fantasy sports industry in the United States, in which participants manage imaginary teams based on the real-life performances of professional players.

The lawsuit involves C.B.C. Distribution and Marketing Inc., a Missouri company unable to obtain a license from a subsidiary of Major League Baseball to use players' names in C.B.C.'s fantasy baseball games.

The Missouri company sued, saying it did not need a license to continue to sell its fantasy baseball games on its Web site.

The baseball players' union jumped into the case on the league's side, alleging a state law violation of the players' publicity rights — the ability to profit from the commercial use of a person's name.

A federal court and the 8th U.S. Circuit Court of Appeals in St. Louis ruled in favor of the fantasy baseball business, saying that enforcing state law rights would violate C.B.C.'s right of free speech protected by the First Amendment.

The National Football League Players Association supported professional baseball's request that the Supreme Court hear the case.

"The definition of marriage predates recorded history," said New York State Catholic Conference Executive Director Richard E. Barnes. "No single politician or court or legislature should attempt to redefine the very building block of our society in a way that alters its entire meaning and purpose."

Paterson issued a memo earlier this month saying that gay New Yorkers who marry where it is legal will have the right to share family health care plans, receive tax breaks by filing jointly, enjoy stronger adoption rights and inherit property.

He cited a February ruling in a New York Appellate Division court in which the judges determined that there is no legal impediment in New York to the recognition of a same-sex marriage.

Earlier this month, the California Supreme Court ruled that same-sex marriage in the nation's most populous state is legal. The ruling overturned a voter-approved ban on gay marriage.

And such unions might soon be recognized at the other end of the country in New York, where the governor has directed state agencies to do so.

California said it chose June 17 because the state Supreme Court has until the day before to decide whether to grant a stay of its May 15 ruling legalizing gay marriage.

Gay-rights advocates and some clerks initially thought couples would be able to wed as early as Saturday, June 14. The court's decisions typically take effect 30 days after they are made.

The guidelines from Janet McKee, chief of California's office of vital records, to the state's 58 county clerks also contained copies of new marriage forms that include lines for "Party A" and "Party B" instead of bride and groom. The gender-neutral nomenclature was developed in consultation with county clerks, according to the letter.

"Effective June 17, 2008, only the enclosed new forms may be issued for the issuance of marriage licenses in California," the directive reads.

A group opposed to gay marriage has asked the court to stay its decision until after the November election, when voters are likely to face a ballot initiative that would once again define marriage as a union between a man and a woman. Passage of the initiative would overrule the Supreme Court.

Under the Supreme Court's regular rules of procedure, justices have until the end of the day June 16 to rule on the stay request, according to the memo sent by e-mail to county clerks. Lawyers involved in the marriage case have said previously the court could grant itself an extra 60 days to consider the stay.