SALEM (AP) - A conservative activist has accused leaders of Oregon's two largest public-employee unions of election law violations, failing to register a campaign arm as a political action committee.

Retired furniture manufacturer Richard Leonetti targets Our Oregon, which has a five-person board consisting of Oregon Education Association and Service Employees International Union leaders.

It spent more than $100,000 on ballot measures in 2006 but didn't register as a political action committee or filed reports on spending and donations, Leonetti said.

“Everybody else has to talk about donors, and they've done none of that,” he said.

His complaint is being reviewed by for possible criminal violations, said Brenda Bayes, the state Elections Division's deputy director.

Our Oregon spokeswoman Patty Wentz said the group, as a political nonprofit, is allowed to engage in communications and education in ballot-measure campaigns without filing as a political action committee.

“I don't think Mr. Leonetti has a clear understanding of Oregon law,” Wentz said.

Our Oregon has a staff of eight and an annual budget of about $600,000, Wentz said. The group gets much of its funding from unions, she said, but also has individual donors.

Our Oregon supported a payday-loan initiative ultimately adopted by the Legislature. It campaigned against ballot measures that sought to limit state spending, cut taxes, re-institute term limits and reform campaign-finance laws.

The group often criticized Howie Rich, a wealthy New York developer, for bankrolling conservative ballot measures while keeping mum about his funding.

Leonetti said he has two backers he won't name, who conducted research and urged him to file the complaint.

One is a Republican and one a Democrat, Leonetti said, but both feared a backlash if their names were public.