(1) The date and location of examinations must be established by the secretary. Applicants who have been found by the secretary to meet the other requirements for obtaining a certificate must be scheduled for the next examination following the filing of the application. The secretary shall establish by rule the examination application deadline.

(2) The secretary shall examine each applicant, by means determined most effective, on subjects appropriate to the scope of practice, as applicable. The examinations must be limited to the purpose of determining whether the applicant possesses the minimum skill and knowledge necessary to practice competently.

(3) The examination papers, all grading of the papers, and the grading of any practical work must be preserved for a period of not less than one year after the secretary has made and published the decisions. All examinations must be conducted under fair and wholly impartial methods.

(4) Any applicant failing to make the required grade in the first examination may take up to three subsequent examinations as the applicant desires upon prepaying a fee determined by the secretary under RCW 43.70.250 for each subsequent examination. Upon failing four examinations, the secretary may invalidate the original application and require remedial education before the person may take future examinations.

(5) The secretary may approve an examination prepared or administered by a private testing agency or association of licensing agencies for use by an applicant in meeting the certification requirements.