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of the eligible remediation costs is granted. The credit is not available to any taxpayer if the taxpayer or any related party caused or contributed to, in any material respect, a release of regulated substances on, in, or under the site that was identified and addressed by the remedial action pursuant to the Site Remediation Program of the Environmental Protection Act. Determinations as to credit availability for purposes of this Section shall be made consistent with rules adopted by the Pollution Control Board pursuant to the Illinois Administrative Procedure Act for the administration and enforcement of Section 58.9 of the Environmental Protection Act. For purposes of this Section, "taxpayer" includes a person whose tax attributes the taxpayer has succeeded to under Section 381 of the Internal Revenue Code and "related party" includes the persons disallowed a deduction for losses by paragraphs (b), (c), and (f)(1) of Section 267 of the Internal Revenue Code by virtue of being a related taxpayer, as well as any of its partners. The credit allowed against the tax imposed by subsections (a) and (b) shall be equal to 25% of the unreimbursed eligible remediation costs in excess of $100,000 per site. (ii) A credit allowed under this subsection that is unused in the year the credit is earned may be carried forward to each of the 5 taxable years following the year for which the credit is first earned until it is used. This SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468