Texas Government Code - GOV'T § 660.074. Group Travel

(a) This section applies only if a key official, member of a board, or member of the legislature travels with another official or member in an aircraft owned or leased by the other official or member.

(b) In addition to the amount entitled to be reimbursed under Section 660.071, the key official, member of a board, or member of the legislature who owns or leases the aircraft is entitled to an amount equal to the amount that would have been paid or reimbursed to each passenger had the passenger incurred the contract airfare, if the passenger's agency is subject to rules adopted under Section 2171.055, or the average coach airfare, if the passenger's agency is not subject to those rules, instead of traveling on the aircraft. The total reimbursement to the official or member may not exceed the total cost of the trip.

(c) The lessee of the aircraft may require the reimbursement to be paid to the vendor providing the leased aircraft instead of the lessee.