Every sheriff shall require appropriate training for jailers in accordance with the jail standards promulgated by the State Department of Health. The sheriff shall not permit supervision of any prisoner in the custody of the jail by any person that does not meet the jail standards for training and supervision of inmates. The sheriff or contractor having charge and custody of the jail shall comply with all minimal supervision standards pursuant to the jail standards promulgated by the State Department of Health, except when otherwise provided by law. Nothing in this section shall be construed to prohibit or restrict the sheriff or contractor having charge and custody of the jail from training or cross-training a person as a backup jailer, if otherwise qualified for such position.