An agent's ostensible authority is determined by what the principal communicated to the third party, not by private arrangements between principal and agent.
Contract
A party who signs a contractual document is bound by its terms whether or not they read or understood them, affirming the objective theory of contract.
Entire agreement clauses and the parol evidence rule preclude reliance on extrinsic implied terms inconsistent with a written contract.
Sets out Australian law on implication of terms and permits extrinsic evidence of surrounding circumstances where contractual language is ambiguous.
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