4.1 A large number of commercial situations are governed, at least in part, by the law of agency, either by its general principles or by particular rules or customs applicable to the situation in hand. A comprehensive survey of agency law cannot be attempted here and must be sought elsewhere. It should be remarked, however, that the relationships between assureds, brokers, underwriting agents and insurers are to a large extent governed by the general law of agency, to which reference should be made when necessary.1