Subject to the following provisions of this section, an electricity distributor may require any person who requires a connection in pursuance of section 16(1) to give him reasonable security for the payment to him under section 19 in respect of the provision of any electric line or electrical plant.
If a person fails to give any security required under subsection (1), or the security given has become invalid or insufficient, and he fails to provide alternative or additional security, the electricity distributor may if he thinks fit—
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Where any money is deposited with an electricity distributor by way of security in pursuance of this section, the distributor shall pay interest, at such rate as may from time to time be fixed by the distributor with the approval of the Director, on every sum of 50p so deposited for every three months during which it remains in the hands of the distributor.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .