In section 26(2)(a) of the principal Act (rules requiring applications for certificates to be accompanied by a photograph of the applicant) for the words “a photograph” there shall be substituted the words “up to four photographs” and the power conferred by sections 27(2) and 28(2) of that Act to prescribe the form of a firearm or shot gun certificate shall include power to require the certificate to bear a photograph of the holder.