P&S Rule 2.10.3" refers to a rule about securing funding in the context of a takeover bid, specifically concerning the "certain funds period" and the bidder's financial adviser confirming funding availability. During this period, lenders are limited in their ability to withdraw committed acquisition finance, ensuring the bidder can complete the acquisition. Key aspects include the bidder having committed financing arrangements, the financial adviser confirming these funds at the time of the offer announcement, and a "certain funds period" for drawing on the financing.