The appointing government, as a condition to approving the establishment of a district or the levying of a preliminary or final assessment, may require that the petitioners or the board, as appropriate, demonstrate the feasibility of the proposed improvements, by providing a feasibility report, such as evidence that the bonds will be purchased by an underwriter or other purchaser, a recommendation by the appropriate officials within the appointing government, or other means as may be required by the appointing government.