The chief executive officer of a facility shall reduce the term of a committed offender by six months for each year of the offender's term and pro rata for any part thereof which is less than a year. The total of all such reductions shall be credited from the date of sentence, which shall include any term of confinement prior to sentence and commitment as provided pursuant to section 83-1,106, and shall be deducted:
270 Neb. Admin. Code, ch. 6, § 001