6 In regulation 33 (Effect of a change in classification from groups to categories), at the beginning of paragraph (1) there shall be inserted the words “Subject to paragraph (4) below,” and at the end of that regulation there shall be inserted the following paragraph:—

“4 Paragraph (1) above shall not authorise a person to drive motor vehicles used for the carriage of passengers with more that 16 seats in addition to the driver’s seat on or after 1st April 1992.”