In this chapter:
(1) “Fee” means:
(A) a criminal fee listed under § 133.003; and
(B) a civil fee listed under § 133.004.
(2) “Indigent” means an individual who earns not more than 125 percent of the income standard established by applicable federal poverty guidelines.
(3) “Treasurer” means the custodian of money in a municipal or county treasury, as appropriate.