What can happen to the premium price according to the rules of endorsements?

The premium price can change after the policy period ends due to endorsements because endorsements are changes or additions to an insurance policy that adjust coverage or modify terms. When an endorsement is added to a policy, it can result in a reassessment of the risk being insured, which may lead to a recalibration of the premium. For example, if new coverage is added that increases the insurer's risk, the premium may increase. Conversely, if coverage is reduced, the premium could decrease.

The key aspect of this process is that the actual change in premium usually takes effect either at the time the endorsement is applied (during the policy period) or when the policy is renewed. However, since the question specifies what can happen after the policy period ends, it recognizes that premiums may change based on the risk re-evaluation that occurs at renewal time, encompassing the potential effects of endorsements made during the prior policy period.

This highlights how flexible premium adjustments can be in the context of endorsements, as they are directly tied to the specific changes made within the policy, which influences the overall risk assessment by the insurer.