The Army recognizes each Private Derby as a soldier and has his own regimental number and documentation. He has been held on the official strength of the Regiment since the first Private Derby. He is paid 3.75 pounds per day. In addition, he is also on the ration strength and draws his own rations like any other soldier. Private Derby even has a leave card and takes an annual holiday at Chatsworth during the mating season. He may even get a promotion if he behaves.