Final answer:
The entity that creates a policy of adhesion, such as an insurance company, has the authority to modify it. Regulatory bodies or courts can also mandate changes if the policy terms are deemed unfair or violate consumer protection laws.
Step-by-step explanation:
The authority to modify a policy of adhesion typically lies with the entity that originally drafted the policy, which is usually an insurance company or service provider. These policies are standard form contracts offered on a "take it or leave it" basis, and the individual party, or policyholder, generally does not have the power to negotiate the terms. However, there might be some regulatory or legal procedures that allow for certain terms within a contract of adhesion to be contested or voided if deemed unfair or unconscionable.
In specific circumstances, a regulatory body or court might have the authority to mandate alterations to such policies, especially if it is found that the terms are not in line with consumer protection laws or regulations. For any modifications to be legally binding, they must be made with the consent of the company that has the authority to modify a policy of adhesion.