The compendium of evidence shall be maintained by the participant for review by the program, court, probation officer, or other appropriate governmental agency. The program officials, unless prohibited by the referring court, shall make provisions for a participant to voluntarily enter, using the participant's own resources, a licensed chemical dependency recovery hospital or residential treatment program which has a valid license issued by the State of California to provide alcohol or drug services, and to receive three weeks of program participation credit for each week of that treatment, not to exceed 12 weeks of program participation credit, but only if the treatment is at least two weeks in duration. The program shall document probative evidence of this hospital or residential care treatment in the participant's program file.
Ca. Health and Saf. Code § 11837.4