Ann: Change in substantial holding, page-9

VERY soon, the seller is required to lodge a 604 Notice.
The following is the pertinent rule :-

Furthermore, for each 1% (or more) change in holding a Form 604 “Notice of Change of Interests of Substantial Shareholder” must be lodged. And, if the holding falls below 5% a Form 605 “Notice of Ceasing to be a Substantial Shareholder” must be lodged.
These Forms must be lodged within 2 business days after they become aware of the transaction or change in % holding and by 9:30am next stock exchange trading day in a takeover situation.
If there are a number of Substantial Shareholders with similar or related relevant interests (eg. a corporation and its related corporations, or the manager and trustee of an equity trust), the names can be included in an annexure to the Form. If the relevant interests of a group of persons are essentially similar, they may be referred to throughout the Form as a specifically named group if the membership of each group, with the names and addresses of members is clearly set out in the Form.