(1) Action to enforce a claim against an authorised insurer may be taken only if the claimant gives written notice of intention to make a claim to the insurer within 3 months after the motor accident.
(2) However, the time for giving the notice may be extended by—
(a) the authorised insurer; or
(b) if the insurer refuses to extend the time—the court in which the action is proposed to be brought.
(3) This section does not apply to a claim for the costs of medical and surgical treatment, or hospital treatment, to which section 186 (Liability of authorised insurer and nominal defendant for costs of treatment) applies.