If the respondent does not request a hearing and the secretary of state does not order a hearing, the order or notice will remain in effect until it is modified or vacated by the secretary of state. If a hearing is requested or ordered, the secretary of state, after giving notice of the hearing, may modify or vacate the order or extend it until final determination.
in obedience to a subpoena of the secretary of state, or in any proceeding instituted by the secretary of state, on the grounds that the testimony or evidence, documentary or otherwise, required of the person may tend to incriminate the person or subject the person to a penalty or forfeiture. However, a person may not be prosecuted or subjected to any penalty or forfeiture for or on account of any transaction, matter, or thing about which the person is compelled, after validly claiming the person's privilege against self-incrimination, to testify or produce evidence, documentary or otherwise.
IC 25-11-1-9