ORS § 700.052
The Health Licensing Office shall issue a registration without written examination to an applicant who pays the required fees and furnishes documentation, as determined by the office by rule, showing satisfactory evidence that the applicant meets the education requirements of this chapter, and at the time of application is registered as an environmental health specialist or waste water specialist by a national association that is recognized by the Environmental Health Registration Board or is registered by the regulatory body of another state. The registration requirements of the other state or the national association, including the written examination, must be substantially equivalent to registration requirements in this state.
ORS 700.052