Public announcement deemed 'other document' alters combination filing verification and notice validity procedures under Competition Act regulatory framework. Regulations amend combination procedure by removing specified verification language and substituting attestation-style declarations in Forms I-III; deeming SEBI takeover public announcements to be the 'other document' for notification; substituting 'company' for prior board-specific references; deleting inter-dependence language and a prior regulation; clarifying that certain minority acquisitions are treated solely as investment subject to non-participation and non-nomination conditions; and providing that the Commission may hear parties before invalidating a notice and exclude the validity-proceedings period from statutory timelines.