Indiana Code Title 1. General Provisions § 1-1-3-4

Sec. 4. (a) This section applies only to an act passed by the general assembly over the governor's veto.

(b) The following definitions apply throughout this section:

(c) If an act declares that a SECTION of the act is effective upon passage, that SECTION takes effect upon approval of the act.

(d) If an act declares that a SECTION of the act applies retroactively to a specified date, that SECTION takes effect on the specified retroactive date.

(e) Except as provided in subsection (d), if an act declares that a SECTION of the act takes effect on a specified date that is before the date of the approval of the act, that SECTION takes effect on the first day of the third calendar month after the calendar month of the approval of the act.

(f) If an act declares that a SECTION of the act takes effect on a specified date that is on or after the date of the approval of the act, that SECTION takes effect on that date.  However, if the specified date occurs before the promulgation of the act, then the SECTION takes effect when promulgation of the act is completed.

(g) This subsection does not apply to a SECTION described in section 3(d) of this chapter.  If an act does not declare an effective date for a SECTION of the act, then that SECTION takes effect on July 1 next following approval of the act.