It is rather long winded but article four states that the generals will place under the protection of the French Republic all property belong to the ruler, his adherents, lay and ecclesiastical communities etc. The idea is that the generals march in, proclaim liberty etc., take custody of the treasury, ensure public safety and call a provisional assembly. The civil commissioners then turn up and do the reorganising and arrange the subsistence etc.
It does not license plundering, though putting generals in charge of protecting the treasury seems unwise in light of subsequent events.
In Belgium it did result in the taking of church treasure which, as Dumouriez complained, was likely to turn the inhabitants hostile.
I don't know whether this law was repealed but it seems, in essence to be the guide Championnet was following in Naples except for his using the cash to pay gratuities to his supporters and his extreme reluctance to cede power (or proceeds) to the civil commissioners.

Susan