The District may be dissolved upon approval of a majority plus one of its then existing member municipalities. A majority of the voters at a duly warned annual or special meeting in at least a majority plus one of the member municipalities, must approve the dissolution and a plan of dissolution which shall include provisions for the payment of all District obligations, a disposal of District assets and the means of apportioning continuing liabilities among the member municipalities. The dissolution plan, prior to submission of the voters, must be submitted to the Attorney General to determine whether the plan is in proper form and compatible with the laws of the State. In the event the Attorney General fails to notify the District of his or her determination within 30 days after receipt of a copy of the dissolution plan, it shall be deemed to have been approved.