The earlier answer is generally correct. However, you seem to present an exception to the basic rule regarding the installation of an interlock IF your ONLY PRIOR DWI was more than 10 years ago. § 521.246 (f). IGNITION INTERLOCK DEVICE REQUIREMENT provides that the interlock shall not be required if the ONLY prior DWI was more than 10 years preceding. Simple logic dictates that, if an interlock can not be ordered for a conviction, then it is not proper to make it a condition of bond. However, I have been forced to argue this several times with judges. One very good judge made me argue it 3 different times before she understood and removed the interlock, so don't expect this to be an easy road. Judges are seldom confronted with this part of the law and, since it does not directly deal with the other law concerning interlock as a condition of bail, tying the different statutes together can be challenging. Please have your attorney call me and I'll walk your attorney through the process, so you can be relieved of this onerous duty.
When a defendant has a prior DWI conviction, Texas law requires interlock as a condition of pretrial bond. Your bondsman and attorney will verify this.
The use of this information shall not create any attorney-client relationship. As noted, you should seek and retain professional counsel in your local county.