(a) The board of regents of the Texas State University System may charge each student enrolled at Texas State University a fee initially set at $10 per semester or $5 per six-week summer term to be used to finance bus service for students attending the institution.
(b) Not more than once in an academic year, the board may increase the fee authorized in Subsection (a) of this section for the purpose of covering increased operating costs of the bus service. Any increase in the fee must be approved by a majority vote of those students participating in a general election called for that purpose. However, the total fee may not exceed $100 per semester or $50 per summer term of six weeks or less.

(c) The fee for student bus service shall not be counted in determining the maximum student service fees which may be charged pursuant to the provisions of § 54.503 of this code.
(d) The university shall hold in reserve any fee revenue that exceeds the amount necessary to meet the operating expenses of the bus service and shall apply that revenue only to future operating expenses of the bus service.