Sec. 28. (a) Mutual debts or mutual credits between the insurer and another person in connection with any action or proceeding under this article shall be set off and only the balance shall be allowed or paid, except as provided in section 31(a) of this chapter.
(b) A setoff or counterclaim shall not be allowed in favor of any person where:
(1) the obligation of the insurer to the person would not at the date of the filing of a petition for liquidation entitle the person to share as a claimant in the assets of the insurer;
(2) the obligation of the insurer to the person was purchased by or transferred to the person with a view to its being used as a setoff; or
(3) the obligation of the person is to pay an assessment levied against the members or subscribers of the insurer, or is to pay a balance upon a subscription to the capital stock of the insurer, or is in any other way in the nature of a capital contribution.