When carrying out its designated regulatory functions the Authority must, wherever it thinks fit—
consult and cooperate with the Northern Ireland Authority;
provide the Northern Ireland Authority with information it may require in order to carry out its designated regulatory functions; and
consult relevant national authorities.
In exercising functions in accordance with subsection (1) the Authority must, wherever it thinks fit, cooperate with the Northern Ireland Authority with a view ... to—
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
the promotion and facilitation of cooperation between transmission system operators;
the optimal management of electricity networks;
the promotion of jointly managed cross-border trade in electricity and the allocation of cross-border capacity;
enabling an adequate level of interconnection capacity;
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and
the coordination of the regulation of electricity markets, including rules concerning the management of congestion of electricity networks.
In this section—
...
...
"relevant national authority" means any of the following—...the Office of Communications; the CMA;the Water Services Regulation Authority.