37 Tex. Admin. Code § 275.4
Inmates shall be supervised by an adequate number of jailers to comply with state law and this chapter. One jailer shall be provided on each floor of the facility where 10 or more inmates are housed, with no less than 1 jailer per 48 inmates or increment thereof on each floor for direct inmate supervision. This jailer shall provide documented visual inmate supervision not less than once every 60 minutes. Sufficient staff to include supervisors, jailers and other essential personnel as accepted by the Commission shall be provided to perform required functions. A plan concurred in by both commissioners' court and sheriff's office, which provides for adequate and reasonable staffing of a facility, may be submitted to the Commission for approval. This rule shall not preclude the Texas Commission on Jail Standards from requiring staffing in excess of minimum requirements when deemed necessary to provide a safe, suitable, and sanitary facility nor preclude submission of variance requests as provided by statute or Chapter 299 of this title.
37 Tex. Admin. Code § 275.4