In addition to any other deductions allowed under this subtitle, as an incentive to reduce a term of incarceration, an incarcerated individual may be allowed a deduction of 5 days from the incarcerated individual’s term of confinement for each calendar month during which the incarcerated individual manifests satisfactory progress in or completion of: vocational courses; other educational and training courses; workforce development training; cognitive–behavioral therapy; substance abuse therapy; life skills training; or antiviolence therapy, including anger management and conflict resolution. The deduction described in subsection (a) of this section shall be calculated: from the first day that the incarcerated individual participates in the course; and on a prorated basis for any portion of the calendar month during which the incarcerated individual participates in the course.