As used in ORS 128.520, "employees' trust" means a trust of real or personal property forming part of a pension, profit sharing, stock bonus, annuity, disability or death benefit plan of an employer or group of employers for the benefit of the employees of the employer or group of employers, to which contributions are made by such employers or employees, or both, for the purpose of distributing income or principal, or both, to such employees or the beneficiaries of such employees.
ORS 128.510