Tex. Insurance Code § 1101.054

(a) Except as provided by Subsection (b), a life insurance policy may not contain a provision under which the policy is issued or takes effect on a date more than six months before the date of the original policy application if the provision causes the insured to rate at an age that is younger than the age of the insured on the date of the application. For the purposes of this subsection, the age of the insured on the date of the application is the age of the insured on the birthday of the insured that is nearest to the date of the application.

(b) An issuer of a life or endowment insurance policy or annuity contract may, with the consent of the policyholder or contract holder, exchange the policy or contract for, or convert the policy or contract into, a policy of another plan of insurance or an endowment or annuity contract as of a date not earlier than the effective date of the original policy or contract.

(c) If an exchange or conversion is made under Subsection (b) and the newly written policy or contract is issued as of a date earlier than the date of the application for exchange or conversion, the amount of life or endowment insurance or annuity provided under the newly written policy or contract may not exceed the greater of:

(1) the amount that the premium paid for the original policy or contract would have purchased on the plan of the newly written policy or contract for an individual the age of the insured on the effective date of the original policy or contract; or

(2) the amount of the original policy or contract.