The administrative system is a style used to perform a task, and is also one of the means used for that, so it does not require specific evidence. It is sufficient for it to have general evidence that indicates to its origin. It would be wrong to say that these styles are human actions, which should therefore be conducted according to the divine rules. This is because the evidence for these actions has come in regards to their origin in a general form, thus it includes all actions that branch out from that origin, unless there is divine evidence that relates to a subsidiary action, in which case the action must follow that evidence. For instance Allah (S.W.T) says, "And pay out the Zakat" [73:20].

Which is a general evidence. Then the evidences came regarding the subsidiary actions which branched out from it, such as the amount of Nisab, the Zakat collectors and the categories of people from whom Zakat is to be taken. All these are actions derived from the ayah, "And pay out the Zakat". There are no evidences to be found about the manner by which the Zakat collectors have to collect the Zakah. For example do they go riding or walking? Do they hire other employees to help them or not? Do they collect it according to records? Do they have to establish headquarters where they would all meet? Would they have warehouses where they would store everything they had collected? Would these houses be underground or built like grain houses? Would the cash Zakat be collected in bags or coffers? All these actions and the like are, in fact, subsidiary actions originating from "And pay out the Zakat." .