What is the normal criterion used to determine the fuel requirement of a base that is not a primary port?

The chosen answer is correct because the standard criterion for determining the fuel requirement for a base that is not classified as a primary port is indeed based on a provision of 10 days' supply that encompasses both wartime and peacetime commitments. This approach ensures that the base is adequately prepared to handle operational demands during both normal, peacetime operations and potential wartime scenarios.

In this context, having a dual focus on both types of commitments rather than only one allows for a more comprehensive and strategic preparation for fluctuating operational needs. This 10-day supply framework is designed to promote readiness and sustainability without overextending resources during quieter periods, thus maintaining a balanced and efficient fuel management system.

While other options present different day counts and focus on specific commitment types, they do not provide the balanced preparation that is enjoyed by utilizing a combined approach to both wartime and peacetime requirements.