If a person who holds a fitter's temporary or apprentice registration certificate issued under the provisions of this act, takes and fails to pass the qualifying examination referred to in this section, the secretary may renew the fitter's temporary registration certificates for a period ending 30 days after the conclusion of the next qualifying examination given after the date of renewal. The secretary shall not issue more than two renewals of such fitter's temporary registration certificate to any applicant, except upon petition by an applicant for good and sufficient cause shown.
35 P.S. § 6700-308