(a) Except as provided by Subsection (b) or (c), if an individual obtains a policy insuring the individual's life, designates in writing a beneficiary to receive the proceeds of the policy, and files the written designation with the company, the company shall pay the proceeds that become due on the death of the insured to the designated beneficiary. (b) A company that issues a life insurance policy is not required to pay the proceeds of the policy to a designated beneficiary under Subsection (a)