Which insurance principle gives a stable proprietor the right to insure horses on behalf of their owners?

The principle that gives a stable proprietor the right to insure horses on behalf of their owners is insurable interest. This principle states that an individual or entity must have a financial stake in the subject matter of the insurance policy in order to take out insurance. In the context of a stable proprietor, they have an insurable interest in the horses they care for because their financial well-being may be affected by the health and safety of those horses. If something were to happen to the horses, it could result in financial loss for the stable operator.

Insurable interest ensures that the insured party has a legitimate reason to seek coverage, preventing moral hazards where individuals might otherwise insulate themselves against risks they do not actually face. By allowing the stable owner to insure the horses, this principle supports risk management practices while aligning the interests of all parties involved.

Other principles like proximate cause, subrogation, and contribution relate to different aspects of insurance, such as determining liability, claims handling, and how insurers may seek reimbursement after paying claims, but they do not specifically address the ability to insure based on ownership and financial interest in the asset being insured.