Mandatory e-payment required for qualifying customs duty payments; importers must use authorised electronic channels or seek permission. Mandatory e-payment is required for customs duty payments above the prescribed threshold and for consignments of designated clients at the Air Cargo Complex, Bangalore; affected challans will be routed only for e-payment, with the National System Manager enabling site-level mandatory e-payment settings and system checks, and importers seeking bank-branch payment must obtain permission from the Additional Commissioner (Systems).