(a) The port authority may collect a fee for permits issued under this subchapter. The fees may not exceed $80 per trip.
(b) Fees collected under Subsection (a) shall be used solely to provide funds for the payments provided for under Section 623.304 and for the port authority's administrative costs, which may not exceed 15 percent of the fees collected. The fees shall be deposited in the state highway fund. Fees deposited in the state highway fund under this section are exempt from the application of Section 403.095, Government Code.