Nothing contained in K.S.A. 12-3401 to 12-3414 , inclusive, shall:
(a) Impair the provisions of law or ordinance directing the payment of revenues derived from public property into sinking funds or dedicating such revenues to specific purposes;
(b) Enlarge, alter, diminish, or affect in any way, any lease or conveyance made, or action taken prior to the creation of a port authority by any city, or by any county;
(c) impair or interfere with the exercise of any permit for the removal of sand or gravel, or other similar permits issued by this state or the United States.