Indiana Code Title 14. Natural and Cultural Resources § 14-15-6-1

Sec. 1. (a) A person may not operate a boat upon public water to carry passengers for hire unless the following conditions are met:

(b) A certificate of inspection and registration expires one (1) calendar year after the date on which the watercraft was inspected.  However, the department may extend the expiration date for not more than thirty (30) days if conditions exist that would prevent the inspection of the watercraft before the first anniversary of the previous inspection.