La. R.S. 22:1125

A health insurance policy or contract issued or issued for delivery in this state after the effective date of this Subpart that offers coverage for a dependent child shall offer dependent coverage, at the option of the policyholder, until the dependent child attains the age of twenty-six. An insurer may require, as a condition of eligibility for coverage in accordance with this Section, that a person seeking coverage for a dependent child provide written documentation on an annual basis that the dependent child satisfies the requirements applicable to dependent children in this Title.