Indiana Code Title 5. State and Local Administration § 5-8-1-4

Sec. 4. The senate must assign a day for the hearing of the impeachment, and inform the managers elected by the house of representatives thereof.  The secretary of the senate must cause a copy of the articles of impeachment, with a notice to appear and answer the same at the time and place appointed, to be served on the defendant not less than ten (10) days before the day fixed for the hearing.