Final answer:
The type of beneficiary designation that would fulfill the policy owner's need to change the beneficiary on a life insurance policy and make the change permanent is the irrevocable beneficiary designation.
Step-by-step explanation:
The type of beneficiary designation that would fulfill the policy owner's need to change the beneficiary on a life insurance policy and make the change permanent is the irrevocable beneficiary designation. An irrevocable beneficiary designation cannot be changed without the consent of the beneficiary, providing a permanent change to the policy. On the other hand, a revocable beneficiary designation can be changed at any time without the need for consent.