20.—(1) In any calendar year the operation of the gas turbine generators comprised in numbered work 1A shall not exceed 1500 hours in total.
(2) Within three months of the end of a calendar year, the undertaker must submit a written report to the relevant planning authority detailing the actual total number of hours of operation of the gas turbine generators comprised in numbered work 1A.
(3) For the purposes of this requirement, “operation of the gas turbine generators” means the duration in which any energy is exported at the settlement metering point, being the point at which a supply to the transmission system from the authorised development is measured.