La. R.S. § 9:2424

When a duly authenticated copy of a will from any state or country where probate is not required by the laws of such state or country, with a duly authenticated certificate of the legal custodian of such original will that the same is a true copy, and that such will has become operative by the laws of such state or country, and when a copy of a notarial will in possession of a notary in a foreign state or country entitled to the custody thereof (the laws of which state or country require that such will remain in the custody of such notary), duly authenticated by such notary, is presented by the executor or other persons interested to the proper court in this state, such court shall probate the same as in case of an original will presented for probate.

If it appears to the court that the instrument ought to be allowed in this state, as the last will and testament of the deceased the copy shall be filed and recorded, and the will shall have the same effect as if originally proved and allowed in the said court.