When a person is convicted before the same court of different offenses, upon all of which he or she is lawfully sentenced to imprisonment, he or she may be committed for all of such offenses upon one mittimus, and the mittimus shall recite the sentence in each case, and contain an order that unless all fines are paid before the expiration of the term or terms of imprisonment, such person shall be imprisoned as provided when a fine only is imposed. Such a term of imprisonment for nonpayment of a fine shall be served consecutive to the previous term or terms to which the respondent is sentenced. (Amended 1969, No. 131, § 3, eff. April 23, 1969; 1971, No. 199 (Adj. Sess.), § 7.)