The reservation covers the subject-matter of the Energy Act 1976, other than section 9.
The 1976 Act enables the Secretary of State to make orders regulating or prohibiting the use of various fuels, or electricity, where that appears to him desirable for the purpose of conserving energy.  It also enables him to make orders regulating or prohibiting the production, supply or acquisition of these things while an Order in Council is in force.  When an Order in Council is in force the Secretary of State may also give directions to producers, suppliers and users.  An Order in Council may be made where the fuller powers it allows are needed to implement an international obligation or to deal with an actual or threatened emergency.  The Act also allows for exemptions from certain legal requirements while an Order in Council is in force.  The 1976 Act also enables the Secretary of State to give directions for conserving fuel stocks, and provides for other measures for controlling energy sources and promoting economy.
Section 9 of the 1976 Act covers the use and liquefaction of offshore natural gas and is reserved under the reservation of Oil and Gas at Section D2.
TABLE OF RESERVED MATTERS Head C: Trade and Industry Reservation