1. Every offender who was sentenced to prison on or before June 30, 1969, who has no serious infraction of the regulations of the Department, the terms and conditions of his or her residential confinement, or the laws of the State recorded against the offender, and who performs in a faithful, orderly and peaceable manner the duties assigned to the offender, must be allowed for his or her term a deduction of 2 months in each of the first 2 years, 4 months in each of the next 2 years, and 5 months in each of the remaining years of the term, and pro rata for any part of a year where the sentence is for more or less than a year.
2. In addition to the credits for good behavior provided for in subsection 1, the Board shall adopt regulations allowing credits for offenders whose diligence in labor or study merits the credits and for offenders who donate their blood for charitable purposes. The regulations must provide that an offender is entitled to the following credits for educational achievement:
(a) For earning a general educational development certificate or an equivalent document, 30 days.
(b) For earning a high school diploma, 60 days.
(c) For earning an associate degree, 90 days.
3. Each offender is entitled to the deductions allowed by this section if the offender has satisfied the conditions of subsection 1 or 2 as determined by the Director.