“agreed margins of error” has the meaning given by paragraph 7(4) above;

“approved” means approved by or under regulations made under paragraph 2 above;

“electricity supplier” means a person authorised by a licence or exemption to supply electricity;

“exempt supply” has the meaning given in paragraph 1(10) above;

“prescribed” means prescribed by regulations;

“prescribed margins of error” has the meaning given by paragraph 5(2) above;

“regulations” means regulations made by the Director with the consent of the Secretary of State.