(1) Whether (a) each time (i) segregation and (ii) mechanical restraints are used it has been authorised by the head of the correctional centre and (b) all cases of the use of mechanical restraints are immediately reported by the head of the correctional centre to the (i) national commissioner and (ii) inspecting judge; if not, why not, in each case; if so, what are the relevant details in each case; (2) what criteria are used to determine the use of non-lethal incapacitating devices; (3) how many injuries have occurred as a result of teargas grenades or catridges that have been used (a) in the (i) 2009-10 and (ii) 2010-11 financial years and (b) during the period 1 January 2012 up to the latest specified date for which information is available?