Oregon Revised Statutes Occupations and Professions § 671.345

(a) On the date of making application is a landscape architect licensed or registered under the laws of any other state or territory of the United States, if the requirements for the licensing or registration of landscape architects in the state or territory in which the applicant is licensed or registered on the date of licensing or registration in such state or territory were substantially equal to the requirements for the registration of landscape architects in this state on the date of the application; or

(b) Within the five years immediately preceding application has passed a national examination acceptable to the board.