Oregon Revised Statutes Military Affairs; Emergency Services § 399.115

(1) Any person who trespasses upon any armory, arsenal, camp, range, base or other facility of the organized militia or other place where any unit of the organized militia is performing military duty, including training, or who in any way or manner interrupts or molests the discharge of military duties by any member of the organized militia or of the Armed Forces of the United States or who trespasses or prevents the passage of troops of the organized militia or of the Armed Forces of the United States in the performance of their military duties may be placed in arrest by the commanding officer, or the designated representative of the commanding officer, of the unit performing such military duty at the place where the offense is committed and may be held in arrest during the continuance of the performance of such military duty, but not to exceed 12 hours.

(2) The commanding officer or the designated representative of the commanding officer, of any unit of the organized militia performing military duty in or at any armory, arsenal, camp, range, base or other facility of the organized militia or other place where such unit is performing military duty may prohibit persons who hawk, peddle, vend or sell goods, wares, merchandise, food products or beverages upon the streets and highways from conducting sales or auctions, and may prohibit all gambling within the limits of such armory, arsenal, camp, range, base or other facility of the organized militia or other place where such unit is performing military duty or within such limits not exceeding one mile therefrom as the commanding officer may prescribe. Such commanding officer may in the discretion of the commanding officer abate as common nuisances all such sales, actions and gambling.