(1) If:
(a) a person (the claimant ) has made a claim in respect of a liability of another person (the defaulter ); and
(b) the claimant has a right, whether under an agreement or otherwise, to set off a liability of the claimant to the defaulter against the liability mentioned in paragraph (a);
the SEGC may refuse to allow the claim until the claimant has exercised the right.
(2) The SEGC may, by notice in writing served on a person, require the person to give the SEGC specified information relating to the existence or exercise of rights of set-off.