Louisiana Revised Statutes Tit. 9, § 2031. Delegation of right to modify

A. A trust instrument may authorize a person who is in being on the date of the creation of the trust to modify the provisions of the trust instrument in order to add or remove beneficiaries, or modify their rights, if all of the affected beneficiaries are descendants of the person given the power to modify. A beneficiary added pursuant to this Section may be a person who is not in being when the trust is created, provided the individual is in being at the time the power to add is exercised.

B. As to a class trust, a trust instrument may authorize a person who is in being on the date of the creation of the trust, or a person who is not yet in being but is a member of the class, to modify the provisions of the trust instrument in order to remove beneficiaries or modify their rights or add only those beneficiaries included within the scope of R.S. 9:1891, if all of the affected beneficiaries are descendants of the person given the power to modify.