The invention relates to a new base stock material. The method includes steps of: determining an expected successful transmit time Ek, for packets of type k, for each of the set of packet types; choosing an optimum packet type for which the value EkLk is a minimum; and partitioning the payload data into packets of the optimum packet type. Determinations are made whether specific combinations of electronic processing states and physical locations are valid and whether specific movements of documents are permitted.