Sec. 2. The rights and appurtenances vesting in a Lessee of the City of Corpus Christi in and to those submerged lands shall be limited only by such limitations as might be imposed in the lease which the City of Corpus Christi deemed proper and in the best interest of the City of Corpus Christi; provided that any lease shall contain a provision prohibiting the Lessee, or assigns thereof, from erecting or maintaining thereon any structure or structures, such as buildings, with the exceptions of yacht basins, boat slips, piers, dry-docks, breakwaters, jetties or the like; and provided further that the right to use the waters embraced by the lease shall be reserved to the public, though the boat slips, piers, dry-docks, and the like may be limited to the private use of the Lessee.