The preventive maintenance Every three months For JPMC and Barclay .who will do it and what is process on this please advice - In short, as CTC is IPC's Distributor. All agreed practices have to be followed accordance to the master agreements. Currently, for IPC GAM sites, IPC shall perform 1 Preventive maintenance per year. More than that, it will be between locally requested and to IPC it will be a MAC charge.