(1) To become licensed as an on-site wastewater treatment system designer or to become an inspector certificate of competency holder the candidate must pass the on-site designer licensing examination as established by the board. The examinations are given at times and places designated by the board. The schedule of future examinations and an examination syllabus may be obtained from the board office. An applicant who has taken an examination and failed or who qualified for an examination but did not take it shall request to take or retake the examination at least three months prior to the examination date. A written request accompanied by the applicable fee and/or charge as listed in chapter 196-30 WAC is required to reschedule for an examination.