(a) The custodians of municipal and county treasuries may deposit funds collected under this article in interest-bearing accounts and retain for the municipality or county interest earned on the funds. The custodians shall keep records of funds received and disbursed under this article and shall provide a yearly report of all funds received and disbursed under this article to the comptroller, the Department of Public Safety, and to each agency in the county served by the court that participates in or maintains a certified breath alcohol testing program. The comptroller shall approve the form of the report.
(b) The custodian of a municipal or county treasury in a county that maintains a certified breath alcohol testing program but does not use the services of a certified technical supervisor employed by the department may, to defray the costs of maintaining and supporting a certified breath alcohol testing program, retain $22.50 of each court cost collected under § 133.102, Local Government Code, on conviction of an offense under Chapter 49, Penal Code, other than an offense that is a Class C misdemeanor.

(c) The legislature may appropriate money deposited to the credit of the breath alcohol testing account in the general revenue fund under this subsection to the Department of Public Safety for use by the department in the implementation, administration, and maintenance of the statewide certified breath alcohol testing program.
(d) The Department of Public Safety shall maintain a list of counties that do not use the services of a certified technical supervisor employed by the department.