In a contract of insurance, which of the following does NOT need to be communicated?

In a contract of insurance, the principle of utmost good faith imposes an obligation on both parties to disclose certain information that is material to the contract. The correct choice indicates that there is no requirement to communicate information that the other party would know by consulting with a specialist. This reflects the understanding that if a party could reasonably obtain necessary information through available resources or expertise, they are not reliant solely on disclosures from the other party. Therefore, if a particular risk or fact is something that a knowledgeable professional could be expected to uncover, the burden of disclosure does not fall on the party possessing that knowledge.

The other options involve circumstances where communication is typically required. For instance, if the other party already knows something, there is no need to disclose it, as it would be redundant. In cases where the other party waives their right to communication, one is not obligated to share information since it is acknowledged that the information need not be formally disclosed. Similarly, information that the other party ought to know through the exercise of ordinary care must be communicated, as it falls under critical elements that impact the risk assessment and underwriting process involved in insurance contracts.