Oregon Revised Statutes Public Health and Safety § 461.230

(a) The drawing must be open to the public;

(b) The drawing must be witnessed by an independent certified public accountant or a professional representative of an independent certified public accountancy organization;

(c) Any equipment used in the drawing must be inspected by the independent certified public accountant or the professional representative of an independent certified public accountancy organization and an employee of the lottery both before and after the drawing; and

(d) The drawing and such inspections shall be recorded on both video and audio tape.

(3)(a) When a drawing is held out of this state in conjunction with other state lotteries, the Oregon State Lottery shall conduct periodic studies of the drawing's security procedures. Any equipment used in a manual drawing must be inspected both before and after the drawing by a professional representative of an independent certified public accountancy organization and a representative of the state lottery designated by the director.

(b) Any manual drawing and such inspections shall be recorded on both video and audio tape.