Section 6-8.1-15-16 - Use of enhanced ZIP codes(a) If an electronic data base is not provided under section 15 of this chapter, a home service provider shall be held harmless from any tax, charge, or fee liability in Indiana that otherwise would be due solely as a result of an assignment of a street address to an incorrect taxing jurisdiction if, subject to section 18 of this chapter, the home service provider employs an enhanced ZIP code to assign each street address to a specific taxing jurisdiction for each level of taxing jurisdiction and exercises due diligence at each level of taxing jurisdiction to ensure that each street address is assigned to the correct taxing jurisdiction. If an enhanced ZIP code overlaps boundaries of taxing jurisdictions of the same level, the home service provider must designate one (1) specific jurisdiction within the enhanced ZIP code for use in taxing the activity for that enhanced ZIP code for each level of taxing jurisdiction. Any enhanced ZIP code assignment changed in accordance with section 18 of this chapter is considered to be in compliance with this section.(b) For purposes of this section, there is a rebuttable presumption that a home service provider has exercised due diligence if the home service provider demonstrates that it has: (1) expended reasonable resources to implement and maintain an appropriately detailed electronic data base of street address assignments to taxing jurisdictions;(2) implemented and maintained reasonable internal controls to promptly correct misassignments of street addresses to taxing jurisdictions; and(3) used all reasonably obtainable and usable data pertaining to municipal annexation, incorporations, reorganizations, and any other changes in jurisdictional boundaries that materially affect the accuracy of the data base.(c) This section applies to a home service provider that is in compliance with the requirements of this section until the later of:(1) eighteen (18) months after the nationwide standard numeric code described in the federal Mobile Telecommunications Sourcing Act (4 U.S.C. 116 et seq.) has been approved by the Federation of Tax Administrators and the Multistate Tax Commission; or(2) six (6) months after the department or a designated data base provider provides a data base as described in section 15 of this chapter.As added by P.L. 104-2002, SEC.2.