1. A "settlement deed" is a "finality" and CANNOT be "perpetually conditional". The mentioned clause is not tenable in law. For eg. one of the legal heirs & family could expire in an accident and then the property cannot be sold /transferred to the expired legal heir, thus jinxing the whole concept of conditional "settlement deed". The conditional clause also gets jinxed IF one or both of the legal heirs go insolvent /bankrupt.
2. HOWEVER, to circumvent the same, the "entire" property can be "mutually & jointly" sold off to a third party, by joint signatures, without any further reference to the earlier "settlement deed".
Keep Smiling .... Hemant Agarwal
VISIT: https://www.maharashtra-society-help-forum.com