Notice of settlement date: liquidator must notify listed contributors using prescribed form and registered post within required time. When a provisional list is filed, the liquidator shall fix a settlement date within one month and give notice to every person on the list stating the amount of contribution in Form No.51; the notice must be sent by certificate of posting, registered post, or any mode under rule 15 to the address in the list so as to reach the addressee in the ordinary course of post not later than fourteen days before the settlement date.