 It required the transport of the Royal Mail by railways at a standardised fee.The Act empowered the Postmaster-General to require the railway companies to "convey the mails", either by special trains or scheduled ones, at such times of the day and night as he would direct; he also had power to specify the guards or postal officials to be carried.However, he could not require they be conveyed any faster than the maximum rate prescribed by that railway's Directors for first-class trains.