The Texas Innocent Owner/Operator (IOP) program was established by the Texas Legislature in 1997. It provides a certificate to an innocent owner or operator if their property is contaminated as a result of a release or migration of contaminants from a source or sources not located on the property, and they did not cause or contribute to the source or sources of contamination. Like the Texas Voluntary Cleanup Program (VCP), the IOP can be used as a redevelopment tool or as a tool to add value to a contaminated property by providing an Innocent Owner/Operator Certificate (IOC). However, unlike the VCP release of liability, IOCs are not transferable to future owners/operators. Future innocent owners or operators are eligible to enter the IOP and may receive an IOC only after they become an owner or operator of the site. The Innocent Owner/Operator Program (IOP) web URL is: (https://www.tceq.texas.gov/remediation/iop/iop.html).