A person who, for any period on or after the relevant date, holds a transmission licence and participates in the transmission of electricity for the purpose mentioned in subsection (2) must ensure that the person is certified by the Authority under section 10D throughout that period.
That purpose is the purpose of—
A person who, for any period on or after the relevant date, holds an interconnector licence and participates in the operation of an electricity interconnector must ensure that the person is certified by the Authority under section 10D throughout that period.
In subsections (1) and (3) the "relevant date" in respect of a person is 3 March 2012 or any later date before 4 March 2013 which the Authority specifies under subsection (5) or (6) in respect of the person.
The Authority may specify a later date in respect of a person if—
The Authority may also specify a later date in respect of a person if the Authority thinks that, for reasons beyond its and the person's control, the Authority will not reasonably be able to make a final decision before 3 March 2012 as to whether to certify the person.
In subsection (5)(b) "vertically integrated undertaking" has the meaning given by Article 2(21) of the Electricity Directive.