Surplus energy; discontinuance of deliveries to maintain ability to meet requirements of Pacific Northwest customers; purchaser’s responsibility for hardships; deliveries by non-Federal utility for use on contiguous distribution system not deemed deliveries for use outside Pacific Northwest

Conservable electric energy; provisional basis for delivery; return of energy to meet requirements of Pacific Northwest customers; time and extent of return of energy

Surplus peaking capacity; termination clause; advance or return of energy; time of return of energy; sale under subsection (a) conditions

Determination of energy requirements of Pacific Northwest non-Federal utility customer; exclusion of conservable energy; sale of surplus energy to the utility