The public entity may, at any time before the last date specified for submission of proposal/qualification, modify the tender documents by issuing an addendum or corrigendum. The modification in tender documents may be made by the public entity either on its own initiative or as a result of any clarification or comment made by the bidders during the pre-bid meeting.
The addendum has to be communicated to all the bidders who have purchased the bidding document. It has to be published in the same dailies, trade journals, business publications, other periodicals and websites in which the advertisement for the project was published.
The addendum issued forms part of the tender document and must be treated as if it were provided originally in the tender document. If the addendum necessitates an extension of the period for bidders to prepare their bids, the public entity has to extend the due date prescribed for submission of the proposal. Generally, in the case of significant amendments, at least 15 days must be provided between the date of amendment and the application due date while in the case of minor amendments, at least seven days must be provided. The public entity cannot make any modification in the bidding document after the bid due date.