Or. Admin. R. 845-006-0360 – Maintenance of License Certificate, Restriction Document, Authority to Operate, Minor Posting Sign

(1) No licensee shall alter any license certificate, restriction document or minor posting sign issued by the Commission.
(2) All Authorities to Operate, license certificates and minor posting signs issued or posted by the Commission must be maintained upon the premises in full public view. Any restriction document referred to in the certificates or accompanying an Authority to Operate shall be maintained at the premises and shall be readily available to Commission staff and law enforcement officers.
(3) Public passenger carriers that are allowed to operate more than one vehicle under a single license may maintain copies of license certificates and restriction documents as required by section (2).

ORS 471, including 471.030, 471.040, 471.730(1) & (5)

ORS 471.030