is eligible for a reduction of sentence for good behavior in the manner provided in this section. For purposes of calculating the amount of time by which an inmate's sentence may be reduced, inmates shall be grouped into the following two sentencing categories: a. ... An inmate of an institution under the control of the department of corrections who is serving a category "A” sentence is eligible for a reduction of sentence equal to one day for each day of good conduct while committed to one of the department’s institutions. In addition, each inmate who is serving a category “A" sentence is eligible for an additional reduction of up to five days per month if the inmate participates satisfactorily in any of the following activi n some manner for unsatisfactory participation. Cf. id. (<HOLDING>). Propp only claims his unsatisfactory
holding that the ex post facto clause  has no application to deportation holding that district court did not violate ex post facto clause in applying remedial holding of booker at sentencing holding imposition of discipline for refusal to supply blood specimen did not violate ex post facto clause holding that revocation of medical license does not violate the ex post facto clause holding that parole guidelines are subject to the ex post facto clause