OAKLAND — Members of the Oakland teachers union have authorized the union leadership to call a one-day strike — once it is legal to do so.

Hundreds cast their votes tonight during a membership meeting held at Oakland Technical High School; 726 out of 771 members voted to authorize a strike, said union President Betty Olson-Jones. Olson-Jones said the members unanimously voted to reject the school district's final offer, which included no changes to the pay scale.

"It's a real clear message to the bargaining team that they have the support of the membership," Olson-Jones said.

The union represents about 2,800 employees, including teachers, counselors and librarians, according to its Web site. In 2006, the district narrowly avoided a strike.

Before the union can take such an action, a fact-finding panel must hold a hearing and issue a nonbinding report on its findings. Olson-Jones has said she's not optimistic the district will offer teachers a raise; the district's chief financial officer has projected a deficit of nearly $40 million for 2010-11.