(1) Every bill of sale shall be executed, attested, and registered under this Act in the following manner—
(a) such bill of sale shall be executed by the grantor in the presence of a notary royal and attested and subscribed in such manner as by the law in force is necessary to render it capable of registration as a deed, and the attestation shall state that before the execution of the bill of sale the effect of it was explained by the notary royal;
(b) every schedule or inventory annexed to a bill of sale or referred to therein shall be registered with the bill of sale, otherwise the registration is void;
(c) if the bill of sale is made or given subject to any defeasance or condition or declaration of trust not contained in the body thereof, such defeasance, condition or declaration shall be deemed to be part of the bill, and shall be written on the same paper or parchment therewith before the registration, otherwise the registration is void.
(2) If 2 or more bills of sale are given, comprising the whole or in part any of the same chattels, they shall have priority in the order of the date of their registration respectively as regards such chattels.