Listing disclosure threshold expanded to top five hundred entities, broadening Regulation 34 disclosure obligations effective from April. Amendment increases the numerical threshold in Regulation 34, sub regulation (2), clause (f) and its proviso by substituting the prior threshold with the words 'five hundred', thereby expanding the set of listed entities subject to the enhanced disclosure obligations of Regulation 34; the amendment is made under the Board's powers and specifies an operative commencement date.