A person is not liable under section 67 if he proves—
A person is not liable under that section if he proves that—
Subsections (1) and (2) of this section do not apply in the case of a person liable, by reason of his having given a consent required of him by section 61, as a person who has authorised the issue of the prospectus in respect of an untrue statement purporting to be made by him as an expert.
Where under section 61 the consent of a person is required to the issue of a prospectus and he has given that consent, he is not by reason of his having given it liable under section 67 as a person who has authorised the issue of the prospectus except in respect of an untrue statement purporting to be made by him as an expert.
A person who, apart from this subsection, would under section 67 be liable, by reason of his having given a consent required of him by section 61, as a person who has authorised the issue of a prospectus in respect of an untrue statement purporting to be made by him as an expert is not so liable if he proves—