Arizona Revised Statutes Title 13. Criminal Code § 13-712. Calculation of terms of imprisonment

A. A sentence of imprisonment commences when sentence is imposed if the defendant is in custody or surrenders into custody at that time. Otherwise it commences when the defendant becomes actually in custody.

B. All time actually spent in custody pursuant to an offense until the prisoner is sentenced to imprisonment for such offense shall be credited against the term of imprisonment otherwise provided for by this chapter. A person who is found competent to stand trial after an involuntary commitment pursuant to § 13-4521 shall receive credit for all time that the person spent under the jurisdiction of the secure state mental health facility against a term of imprisonment for any of the charges that were the basis for the involuntary commitment.

C. If a sentence of imprisonment is vacated and a new sentence is imposed on the defendant for the same offense, the new sentence is calculated as if it had commenced at the time the vacated sentence was imposed, and all time served under the vacated sentence shall be credited against the new sentence.

D. If a person serving a sentence of imprisonment escapes from custody, the escape interrupts the sentence. The interruption continues until the person is apprehended and confined for the escape or is confined and subject to a detainer for the escape. Time spent in actual custody before return under this subsection shall be credited against the term authorized by law if custody rested on an arrest or surrender for the escape itself, or if the custody arose from an arrest on another charge which culminated in a dismissal or an acquittal, and the person was denied admission to bail pending disposition of that charge because of a warrant lodged against such person arising from the escape.

E. The sentencing court shall include the time of commencement of sentence under subsection A of this section and the computation of time credited against sentence under subsection B, C or D of this section in the original or an amended commitment order, under procedures established by rule of court.