Louisiana Revised Statutes Tit. 15, § 566.2. Commencing of sentence to state penitentiary

Whenever a prisoner is sentenced to imprisonment in the state penitentiary, and has not been released on bail or perfected a suspensive appeal, such sentence shall be considered as commencing on the day following the day on which such prisoner is sentenced without regard to the actual date of incarceration in the state penitentiary.