(a) There is an addition or deletion of a director, trustee, principal officer, general partner, general manager or principal management persons, or persons occupying similar positions or performing similar functions, or a substantial and material change in the duties of any such person.

(b) There is the addition or deletion of a limited partner, shareholder or owner of an equity interest in the plan, whose interest exceeds 5 percent of the total partnership interests, shares or equity interests, or there is a change in the interest of any partner, shareholder or owner of an equity interest exceeding 5 percent of the total partnership interests, shares or equity interests.

(c) There is the addition or deletion of a principal creditor, as defined in Section 1300.45, a material change in the terms of the obligation to a principal creditor, a material increase or decrease in the amount due a principal creditor other than (except in the case of a demand obligation) by the normal terms of the obligation, or a default in the obligation to a principal creditor.