(a) In addition to any other deductions allowed under this subtitle, as an incentive to reduce a term of incarceration, an inmate may be allowed a deduction of 5 days from the inmate’s term of confinement for each calendar month during which the inmate manifests satisfactory progress in or completion of:

(1) vocational courses;

(2) other educational and training courses;

(3) workforce development training;

(4) cognitive-behavioral therapy;

(5) substance abuse therapy;

(6) life skills training; or

(7) antiviolence therapy, including anger management and conflict resolution.

(b) The deduction described in subsection (a) of this section shall be calculated:

(1) from the first day that the inmate participates in the course; and

(2) on a prorated basis for any portion of the calendar month during which the inmate participates in the course.