AGM notice- amendment

SS-2 clearly mentions that ,amendment in notice of meeting including additions are required 21 clear days' notice as of AGM ,If it given at lesser time period ,then shorter notice provision has to be followed ,but if it's just typo error or withdrawal of resolution ,then it seems allowed subject to reasonable notice given to shareholders (at least before Evoting commences ) in form of "Corrigendum and addendum" ,Newspaper publication also required.