This document discusses the key rules regarding a valid acceptance in contract law. It defines acceptance under Indian law and outlines 9 rules for a valid acceptance, including that acceptance must be absolute and unqualified, communicated to the offeror according to the prescribed mode, given within a reasonable time period, and cannot be implied from silence unless previously indicated. It also provides further details on 3 specific rules - that acceptance must confirm with all terms of the offer, be given within a reasonable time if no time limit is specified, and generally cannot be implied from silence.