The Minister may on the recommendation of the Director-General, and after consultation with the Board, amend Schedule 4 by notice in the Gazette in respect of the nature, extent, minimum and maximum amount of benefits: Provided that at least 60 days before any such amendment a notice shall be published in the Gazette--
a) of the intention to effect an amendment and the proposed content of the amendment; and
b) inviting any person who wishes to comment on the proposed amendment to submit such comment in writing to the commissioner within the period mentioned in the notice.