Oregon Revised Statutes Animals § 604.021

(1) The State Department of Agriculture shall be the exclusive recorder of livestock brands. The department may not record:

(2) The proscription set forth in subsection (1)(a) of this section does not prohibit the continued use of any such brands that were previously recorded. Also, such letters and figures may be used on the shoulders of cattle or other locations approved by the department by the owners thereof for the purposes of identifying breed, breed registry, rodeo or show registry, age or similar characteristics, but may not be so used as to conflict with or be confused with a recorded brand.

(3) The department is authorized to modify, rescind or refuse the recording of any brands that are conflicting or that the department believes will blotch, and make any changes in brands deemed necessary to resolve a conflict or correct a design imperfection. Notwithstanding ORS chapter 183, any such modification, change, rescission or refusal of the department may be made by written notice to affected persons and shall be a final order of the department.