No penalty may be imposed in respect of a contravention by a relevant operator—
by virtue of paragraph (a) of subsection (1) of section 57A above in a case where no final or provisional order has been made in relation to the contravention, or
by virtue of paragraph (b) of that subsection,
unless a copy of the notice relating to the penalty under section 57C(1) above is served on the relevant operator within two years of the time of the contravention.
No penalty may be imposed in respect of a contravention by a relevant operator by virtue of section 57A(1)(a) above in a case where a final or provisional order has been made in relation to the contravention unless a copy of the notice relating to the penalty under section 57C(1) above is served on the relevant operator—
within three months of the confirmation of the provisional order or the making of the final order; or
where the provisional order is not confirmed, within six months of the making of the provisional order.