The Seattle Metro Chamber of Commerce has endorsed Referendum 74, the Washington state ballot question which would uphold the state's gay marriage law.

The marriage law, which was approved by lawmakers at the urging of Governor Chris Gregoire, was set to take effect last month but it was put on hold when opponents turned in more than twice the number of signatures needed to put the law up to a public vote in November.

The Chamber's Board of Trustees adopted a resolution in support of Referendum 74 on Wednesday.

“There is a clear business case for supporting equal access to civil marriage rights,” said George Allen, senior vice president of Government Relations for the Chamber. “Marriage equality allows our companies to streamline benefit administration, improves our ability to recruit and retain the best talent, and helps our state's bottom line.”

The Chamber represents 2,200 companies across the Puget Sound region.

On Monday, Washington United for Marriage, the campaign to keep marriage equality, announced it has raised more than $2 million. Opponents seeking to overturn the law have raised $139,702 as of the end of June, but said they plan to raise $4 million.

(Related: Microsoft's Bill Gates, Steve Ballmer support Washington gay marriage.)