Difference in conditions policies are usually written for which of the following?

Difference in conditions policies are primarily designed to address specific gaps in coverage that may exist in other standard insurance policies. They provide broader coverage for risks that are not fully addressed by typical policies, especially in the realm of large-scale operations or high-value assets.

These policies are often utilized for large risks that require specialized coverage beyond what a standard policy can offer. They typically work in conjunction with other insurance policies to fill gaps, often customized for high-value personal property or businesses that have unique or extensive needs that necessitate additional protection. The emphasis on "large risks with a reinsurance requirement" highlights the purpose of these policies, as they are tailored to manage exposures and liabilities that may exceed conventional limits.

While high-value personal property could also benefit from different insurance structures, the specificity of "large risks" calls for a focus on businesses or individuals managing extensive or intricate portfolios that require more detailed and broader conditions than those provided by standard policies. Hence, this correct answer aligns well with the intended purpose and use of difference in conditions policies.