Some states have disclosed some of Tier I offenders,  while in some states all Tier I offenders are excluded from public disclosure. These disparities in state legislation have caused unexpected problems to some registrants when moving from state to another, finding themselves subject to public disclosure on their destination state's sex offender website, and longer registration periods sometimes for life , even though they originally were excluded from public registry and required to register for a shorter period. The TBI is responsible for maintaining the electronic sex offender database and sex offender files. In the United States offenders are often classified in three categories: In some US jurisdictions, the level of offender is reflecting the evaluated recidivism risk of the individual offender, while in others, the level is designated merely by the virtue of conviction, without assessing the risk level posed by the offender. Level 3 sex offender presents the highest risk of reoffending. Information pertaining to names, addresses, physical description and vehicles are made public via official websites. At least one state Illinois reclassifies all registrants moving in the state into the highest possible tier Sexual Predator , regardless of the original tier of the person, leading to a lifetime registration requirement and being publicly labelled as a "Sexual Predator". How much does it cost to register, and where does the money go? The Supreme Court of the United States has upheld sex offender registration laws twice, in two respects. Step-parents are not exempt from this law. A bill to create a publicly accessible registry for domestic violence offenders passed the Texas House of Representatives in , but was not voted on in the Texas Senate. Like the Australian and British registers, the New Zealand sex offenders register will not be accessible to the general public but only to officials with security clearance. Sex offenders who have completed probation or parole may also be subject to restrictions above and beyond those of most felons. All 50 states and District of Columbia maintain registries that are open to public via sex offender registration websites, although some registered sex offenders are visible to law enforcement only.