Loco allocation is not done according to the zone. It is done solely based on loco availability. Any zone's loco can haul a particular train. MAS Raj is an NR train and shares a slot with SC Raj and similarly SC Duronto shares a slot with MAS duronto. So, LGD may be providing links for trains. RPM WAP7's rarely go to SC as most of the SCR trains from MAS have LGD or BZA links. So, LGD may have taken up the loco link for this bi-weekly train.