721. The notarial will of a deaf person or a deaf-mute is read by the testator himself in the presence of the notary alone or, if he chooses, of the notary and a witness. If the testator is only deaf, he reads the will aloud.
In the will, the testator declares that he has read it in the presence of the notary and, where such is the case, the witness.
If the testator is deaf-mute, the declaration is read to him by the notary in the presence of the witness; if he is deaf, it is read aloud by the testator himself, in the presence of the notary and the witness.