37 Tex. Admin. Code § 275.7
Inmates shall be observed by a peace officer or a jailer licensed by the Texas Commission on Law Enforcement or bailiff when outside the security perimeter in court holding cells. The sheriff/operator shall have an established procedure for documented, face-to-face observation of all inmates no less than once every 30 minutes. One jailer, licensed peace officer, or bailiff shall be provided on each floor where 10 or more inmates are detained, with no less than one jailer, licensed peace officer, or bailiff per 48 inmates or increment thereof on each floor for direct inmate supervision. Where required, there shall be a two-way voice communication capability between inmates and jailers, licensed peace officers, or bailiffs at all times. Closed circuit television may be used, but not in lieu of the required personal observation.
37 Tex. Admin. Code § 275.7