All ship dues, pilotage fees, quarantine fees, and miscellaneous revenue collected through the harbors of the Virgin Islands shall be covered into a special fund in the Treasury of the Virgin Islands to be known as the “Marine and Aviation Fund”. All expenses of administering said harbors shall be paid from said fund on an annual budget basis to be enacted by the Legislature and approved by the Governor. The Legislature may make grants to the special fund from the general fund as may be needed to supplement the revenues of the said special fund.