(1) The trust agreement must provide that the commissioner shall authorize and approve in writing all withdrawals of trusteed assets in advance except as follows:

(a) Any or all income, earnings, dividends, or interest accumulations of the trusteed assets may be paid over to the United States manager of the insurer upon request of the insurer or the manager;

(b) Withdrawals coincident with substitutions of securities or assets that are at least equal in value to those being withdrawn, if the substituted securities or assets would be eligible for investment by domestic insurers, and the insurer's United States manager requests the withdrawal in writing under a general or specific written authority previously given or delegated by the insurer's board of directors, or other similar governing body, and a copy of such authority has been filed with the trustee;

(c) For the purpose of making deposits required by another state in which the insurer is, or becomes, an authorized insurer and for the protection of the insurer's policyholders or creditors, or both, in the state or United States, if the withdrawal does not reduce the insurer's deposit in this state to an amount less than the minimum deposit required. The trustee shall transfer any assets withdrawn and in the amount required to be deposited in the other state, directly to the depositary required to receive the deposit as certified in writing by the public official having supervision of insurance in that state; and

(d) For the purpose of transferring the trusteed assets to an official liquidator, conservator, or rehabilitator under an order of a court of competent jurisdiction.

(2) The commissioner shall authorize a withdrawal of only those assets that are in excess of the amount of assets required to be held in trust, or as may otherwise be consistent with the provisions of this chapter.

(3) If at any time the insurer becomes insolvent or if its assets held in the United States are less than required as determined by the commissioner, the commissioner shall order in writing the trustee to suspend the withdrawal of assets until a further order of the commissioner releasing the assets.