A minimum passing grade of 75% shall be required on all examinations. Examinations
shall be specific to the trade category for which application for a certificate of
competency has been made. Said examinations shall be proctored and graded by a testing
agency meeting all the requirements of section 22-185. When a certificate of competency becomes void pursuant to section 22-191 herein, all previous examination scores shall be disregarded except when the most
recent relevant examination was taken and passed within three years of the date of
receipt of the new application, pursuant to F.S. ch. 489.
