(1) Sentences of Imprisonment for More Than One Crime.  When multiple sentences of imprisonment are imposed on a defendant for more than one crime, including a crime for which a previous suspended sentence or sentence of probation has been revoked, such multiple sentences shall run concurrently or consecutively as the Court determines at the time of sentence, except that:

    (a) a definite and an indefinite term shall run concurrently and both sentences shall be satisfied by service of the indefinite term;  and

    (b) the aggregate of consecutive definite terms shall not exceed one year;  and

    (c) the aggregate of consecutive indefinite terms shall not exceed in minimum or maximum length the longest extended term authorized for the highest grade and degree of crime for which any of the sentences was imposed;  and

    (d) not more than one sentence for an extended term shall be imposed.

  (2) Sentences of Imprisonment Imposed at Different Times.  When a defendant who has previously been sentenced to imprisonment is subsequently sentenced to another term for a crime committed prior to the former sentence, other than a crime committed while in custody:

    (a) the multiple sentences imposed shall so far as possible conform to Subsection (1) of this Section;  and

    (b) whether the Court determines that the terms shall run concurrently or consecutively, the defendant shall be credited with time served in imprisonment on the prior sentence in determining the permissible aggregate length of the term or terms remaining to be served;  and

    (c) when a new sentence is imposed on a prisoner who is on parole, the balance of the parole term on the former sentence shall be deemed to run during the period of the new imprisonment.

  (3) Sentence of Imprisonment for Crime Committed While on Parole.  When a defendant is sentenced to imprisonment for a crime committed while on parole in this State, such term of imprisonment and any period of reimprisonment that the Board of Parole may require the defendant to serve upon the revocation of his parole shall run concurrently, unless the Court orders them to run consecutively.

  (4) Multiple Sentences of Imprisonment in Other Cases.  Except as otherwise provided in this Section, multiple terms of imprisonment shall run concurrently or consecutively as the Court determines when the second or subsequent sentence is imposed.

  (5) Calculation of Concurrent and Consecutive Terms of Imprisonment.

    (a) When indefinite terms run concurrently, the shorter minimum terms merge in and are satisfied by serving the longest minimum term and the shorter maximum terms merge in and are satisfied by discharge of the longest maximum term.

    (b) When indefinite terms run consecutively, the minimum terms are added to arrive at an aggregate minimum to be served equal to the sum of all minimum terms and the maximum terms are added to arrive at an aggregate maximum equal to the sum of all maximum terms.

    (c) When a definite and an indefinite term run consecutively, the period of the definite term is added to both the minimum and maximum of the indefinite term and both sentences are satisfied by serving the indefinite term.

  (6) Suspension of Sentence or Probation and Imprisonment;  Multiple Terms of Suspension and Probation.  When a defendant is sentenced for more than one offense or a defendant already under sentence is sentenced for another offense committed prior to the former sentence:

    (a) the Court shall not sentence to probation a defendant who is under sentence of imprisonment [with more than thirty days to run] or impose a sentence of probation and a sentence of imprisonment [, except as authorized by Section 6.02(3)(b) ];  and

    (b) multiple periods of suspension or probation shall run concurrently from the date of the first such disposition;  and

    (c) when a sentence of imprisonment is imposed for an indefinite term, the service of such sentence shall satisfy a suspended sentence on another count or a prior suspended sentence or sentence to probation;  and

    (d) when a sentence of imprisonment is imposed for a definite term, the period of a suspended sentence on another count or a prior suspended sentence or sentence to probation shall run during the period of such imprisonment.

  (7) Offense Committed While Under Suspension of Sentence or Probation.  When a defendant is convicted of an offense committed while under suspension of sentence or on probation and such suspension or probation is not revoked:

    (a) if the defendant is sentenced to imprisonment for an indefinite term, the service of such sentence shall satisfy the prior suspended sentence or sentence to probation;  and

    (b) if the defendant is sentenced to imprisonment for a definite term, the period of the suspension or probation shall not run during the period of such imprisonment;  and

    (c) if sentence is suspended or the defendant is sentenced to probation, the period of such suspension or probation shall run concurrently with or consecutively to the remainder of the prior periods, as the Court determines at the time of sentence.