Period of subscription governs bidding windows and mandates extensions for price revisions or unforeseen events. Period of subscription requires a further public issue to remain open for a minimum of three working days and a maximum of ten working days. If the price band is revised, the issuer must extend the disclosed bidding period by at least three working days. In cases of force majeure, banking strike or similar unforeseen events, the issuer may extend the disclosed bidding or issue period for a minimum additional period, provided the reasons are recorded in writing and the extension complies with the overall minimum and maximum period limits.