(a) Except as otherwise provided in this section, a trust company may not:

(b) If, because of a creditor relationship or otherwise, a trust company acquires an interest in a participation in a common trust fund that it administers, the participation shall be withdrawn on the next valuation date allowed by the fund plan.

(c) A trust company does not have a prohibited interest in the assets of a common trust fund that it administers merely because the trust company owns in its own right any stocks, bonds, or other obligations issued by a person from whom the fund also holds stocks, bonds, or other obligations.