BILATERAL & UNILATERAL CONTRACT Bilateral Unilateral all parties promise to do something for one another; they bind all parties and are enforceable against all parties. one party promises to do something to induce the second party to do something; they are binding on and enforceable against only one party, i.e. the party that made the promise. S4(a): Proposals must be communicated to the other party to the extent that the party accepting the proposal is aware of the existence of such proposal in the first place. - Revocation - Rejection of offer Invitation to treat Section 2 (a) of the Contract Act: a proposal is made ‘when one person signifies to another his willingness to do or abstain from doing anything, with a view of obtaining the assent of that other to such act of abstinence’. COMMUNICATION OF PROPOSAL - Counter offer Offer DEFINITION OFFERS AND INVITATION TO TREAT EXAMPLE OF INVITATION OF TREAT a sort of preliminary communication which passes between the parties at the stage of negotiation. - a price list - a display of goods with price tags in a supermarket - an advertisement -an auctioneer inviting bids for a particular article. TERMINATION OF PROPOSAL TO WHOM PROPOSAL CAN BE MADE? -particular person -general public