Tenn. Code Ann. § 40-35-216: First hours served hour for hour

Notwithstanding any other law or judgment of conviction to the contrary, the first forty-eight (48) hours of any sentence that a defendant is permitted to serve on nonconsecutive days, or in any manner other than continuous confinement or day for day, shall be served hour for hour. This section shall only apply to sentences imposed pursuant to § 55-10-402 .