44.—(1) The sum specified by the Regulator in a contribution notice under Article 43 may be either the whole or a specified part of the shortfall sum in relation to the scheme.
(2) The shortfall sum in relation to a scheme is—
(a)in a case where, at the time of non-compliance, a debt was due from the employer to the trustees or managers of the scheme under Article 75 of the 1995 Order (deficiencies in the scheme assets), the amount which the Regulator estimates to be the amount of that debt at that time, and
(b)in a case where, at the time of non-compliance, no such debt was due, the amount which the Regulator estimates to be the amount of the debt under Article 75 of the 1995 Order which would become due if—
(i)paragraph (2) of that Article applied, and
(ii)the time designated by the trustees or managers of the scheme for the purposes of that paragraph were the time of non-compliance.
(3) For the purposes of this Article “the time of non-compliance” means—
(a)in the case of non-compliance with sub-paragraph (a) of paragraph (3) of Article 39 (financial support directions), the time immediately after the expiry of the period specified in the financial support direction for putting in place the financial support,
(b)in the case of non-compliance with sub-paragraph (b) of that paragraph, the time when financial support for the scheme ceased to be in place,
(c)in the case of non-compliance with sub-paragraph (c) of that paragraph, the time when the prescribed event occurred in relation to which there was the failure to notify the Regulator, or
(d)where more than one of sub-paragraphs (a) to (c) apply, whichever of the times specified in the applicable sub-paragraphs the Regulator determines.