Section 22(b) in The Central Electricity Regulatory Commission (Open Access in Inter-State Transmission) Regulations, 2004
(b)A composite request for open access and scheduling shall be sent to the nodal Regional Load Despatch Centre through the State Load Despatch Centre concerned latest by 3.00 PM. The nodal Regional Load Despatch Centre shall take steps to incorporate the request for open access in the schedules to be issued by the Regional Load Despatch Centres concerned, if the request can be accommodated without causing congestion.
