 Officers from other provinces were called when the local officers were not trustworthy.Test inquiries were also held in one locality within each province, to detect errors of implementation.The number of officers in the "Contadurías de Rentas Provinciales" (i.e., the central treasury bureaucracy) rose from no more than three to more than a hundred, now under the orders of the "Real Junta de Única Contribución" (royal commission for a single tax).