Held, in allowing the appeal:
(1) Where parties have reached agreement as to the terms of a contract, but have also agreed that a further, formal agreement is to be executed, whether the parties intend to be immediately bound is to be determined objectively, having regard to the "outward manifestations" of their intentions. [64]-[65] (Beazley P); [162] (Meagher JA)
Toll (FGCT) Pty Limited v Alphapharm Pty Limited [2004] HCA 52; 219 CLR 165; Pacific Carriers Ltd v BNP Paribas [2004] HCA 35; 218 CLR 451; Brambles Holdings Ltd v Bathurst City Council [2001] NSWCA 61; 53 NSWLR 153; Electricity Generation Corporation v Woodside Energy Ltd [2014] HCA 7; 251 CLR 640; Mushroom Composters Pty Ltd v IS & DE Robertson Pty Ltd [2015] NSWCA 1; Taylor v Johnson [1983] HCA 5; 151 CLR 422.
(2) The three classes set out in Masters v Cameron [1954] HCA 72; 91 CLR 353 are not be to applied as strict categories into which cases must fall. Rather, the decisive issue is always the intention of the parties, ascertained objectively from the terms of the agreement, read in the light of the surrounding circumstances. [69] (Beazley P); [162] (Meagher JA)
Ermogenous v Greek Orthodox Community of SA Inc [2002] HCA 8; 209 CLR 95; GR Securities v Baulkham Hills Private Hospital Pty Ltd (1986) 40 NSWLR 631; Air Great Lakes Pty Ltd v K S Easter (Holdings) Pty Ltd (1985) 2 NSWLR 309
(3) The commercial context and surrounding circumstances of the parties' previous dealings are relevant considerations in the determination of whether a binding agreement has come into existence between parties. [15] (Bathurst CJ); [72], [84] (Beazley P); [162] (Meagher JA)
Australian Broadcasting Corporation v XIVth Commonwealth Games Ltd (1988) 18 NSWLR 540; Toyota Motor Corporation Australia Ltd v Ken Morgan Motors Pty Ltd [1994] 2 VR 106
(4) Regard may be had to the subsequent conduct of parties to determine whether, at an earlier juncture, the parties intended to enter into a binding agreement. [15] (Bathurst CJ); [118] (Beazley P); [162] (Meagher JA)
Australian Broadcasting Corporation v XIVth Commonwealth Games Ltd; Brambles Holdings Ltd v Bathurst City Council; Sagacious Procurement Pty Ltd v Symbion Health Ltd [2008] NSWCA 149; Johnston v Brightstars Holding Company Pty Ltd [2014] NSWCA 150
(5) Whether parties intend to bind themselves to a contract is determined objectively, having regard to the intention disclosed by the language the parties have employed. In cases which do not depend on the construction of a single document, what is involved is an objective determination of the question from the communications between the parties in their context and the parties' dealings over the time leading up to the making of the alleged contract. This involves a consideration of the subject matter of the communications and what the parties said or wrote. [15] (Bathurst CJ)
Masters v Cameron [1954] HCA 72; 91 CLR 353; Australian Broadcasting Corporation v XIVth Commonwealth Games Ltd (1988) 18 NSWLR 540; Air Great Lakes Pty Ltd v KS Easter (Holdings) Pty Ltd (1985) 2 NSWLR 309
(6) Solicitors have actual authority to conduct negotiations on behalf of their clients as to the terms of a contract between parties. Without clear and cogent evidence this does not extend to the authority to bind one's client. [137]-[141] (Beazley P); [162] (Meagher JA)
Pianta v National Finance & Trustees [1964] HCA 61; 180 CLR 146; Nguyen v Taylor (1992) 27 NSWLR 48; Summit Properties Pty Ltd v Comserv (No 784) Pty Ltd (1981) 2 BPR 9173; Kent v Hogarth [1995] QCA 472; Stewart Upton Pty Ltd v Pindar (1990) NSW ConvR 55-529
(7) As a general proposition, a solicitor does not have ostensible authority to bind his or her client to a contract, however an exception lies in the context of litigation. Disputes that are merely potentially litigious disputes are not sufficient to engage the ostensible authority of a solicitor under this exception. [21] (Bathurst CJ); [150], [154] (Beazley P); [162] (Meagher JA)
Lucke v Cleary (2011) 111 SASR 134; CIC Insurance Ltd v Bankstown Football Club Ltd [1994] NSWCA 359; 8 ANZ Insurance Cases ¶61-232.
(8) The onus lies on the party submitting agency to demonstrate the existence and terms of that agency. [143] (Beazley P); [162] (Meagher JA)
Quikfund (Australia) Pty Ltd v Prosperity Group International Pty Ltd (in liq) (2013) 209 FCR 368.