For the purpose of promoting the sale of coal by the National Coal Board to the Central Electricity Generating Board or the South of Scotland Electricity Board during the period consisting of the financial years 1974-1976, the Secretary of State with the approval of the Treasury may out of moneys provided by Parliament make payments to the National Coal Board.

The aggregate amount of the payments made by the Secretary of State under this section shall not exceed £50 million or such greater sum, not exceeding £100 million, as the Secretary of State may by order specify.

Payments made by the Secretary of State under this section may be made subject to such conditions as the Secretary of State with the approval of the Treasury may determine.