Oregon Revised Statutes Occupations and Professions § 700.035

(1) Subject to ORS 676.612, upon application and payment of the applicable fees established under ORS 676.592, the Health Licensing Office shall issue an environmental health specialist trainee registration to any applicant who performs to the satisfaction of the Environmental Health Registration Board on an examination approved by the board and furnishes evidence satisfactory to the office that the applicant:

(2) A person may not be registered as an environmental health specialist trainee for more than two years' full-time employment in the environmental sanitation profession, or the equivalent hours if employment in environmental sanitation is less than full-time or 40 hours per week.

(3) The office, in consultation with the board, shall establish by rule requirements for registration as an environmental health specialist trainee when an individual's date of employment precedes attainment of registration.

(4) An environmental health specialist trainee shall be supervised by a registered environmental health specialist or a person possessing equal qualifications as determined by the board.