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The Authority must revoke an exemption given under section 19A in respect of a facility—
if the construction of the facility, or (as the case may be) the making of the modification to which the exemption relates, has not been started within the 2 years beginning with the relevant date; or
if the facility, or (as the case may be) the modification to which the exemption relates, is not operational within the 5 years beginning with the relevant date.
In subsection (3) "relevant date" means—
if before IP completion day the European Commission notified the Authority that it approved the exemption and terms as copied to it under subsection (1) (as it then had effect), the date of that notification;
if, before IP completion day and in accordance with Article 36(9) of the Gas Directive, the European Commission required the Authority to modify the terms, the date of that requirement;
if—
before IP completion day the Authority sent the European Commission a copy of the exemption and terms under subsection (1) (as it then had effect), and
the European Commission does not act as described in paragraph (a) or (b) before IP completion day,
the date 4 months after the Authority sent the European Commission a copy of the exemption and terms under subsection (1) or IP completion day, whichever is the sooner;
if the decision to give the exemption was published under section 19A(11) on or after IP completion day, the date on which the decision was published under section 19A(11).
The Authority may at any other time revoke an exemption given under section 19A, or modify the terms on which such an exemption is given, in respect of a facility—
in accordance with the provisions of the exemption; or
by giving the owner of the facility a notice of revocation at least 4 months before the revocation takes effect.