This chapter shall not do any of the following:

1. 1. Impair a provision of law directing the payment of revenues derived from public property into sinking funds or dedicating those revenues to specific purposes.
2. 2. Impair the powers of a political subdivision to develop or improve a port and terminal facility except as restricted by section 28J.15.
3. 3. Enlarge, alter, diminish, or affect in any way, a lease or conveyance made, or action taken prior to the creation of a port authority under section 28J.2 by a city or a county.
4. 4. Impair or interfere with the exercise of a permit for the removal of sand or gravel, or other similar permits issued by a governmental agency.
5. 5. Impair or contravene applicable federal regulations.

2005 Acts, ch 150, §99