La. Stat. tit. 9 § 2433
No beneficial interest in income from a trust and no usufruct shall be subject to apportionment as between the principal beneficiary in the case of the trust and the naked owner in the case of the usufruct. The tax on the beneficial interest in income from a trust or the usufruct shall be chargeable against the principal of the trust or the naked ownership of the property in the case of the usufruct. The court shall order that portion of the property subject to the usufruct, or that portion of the trust principal subject to the rights of an income beneficiary, to be sold in whole or in part to pay the tax apportioned in accordance with this Section. Thereafter, only the balance of the property remaining after the sale or the balance of the proceeds of the sale not necessary for the payment of the tax shall be subject to the usufruct or the rights of an income beneficiary of a trust. To avoid the sale or other disposition of property which is subject to a usufruct or an income interest in a trust to satisfy the tax liability, the usufructuary and the naked owner, or the principal beneficiary and the income beneficiary, may agree to the method of and responsibility for payment of the tax.
La. R.S. § 9:2433