(5) Maximum incentive base amount.—

(A) In general.—For purposes of paragraph (4), the maximum incentive base amount for a State for a fiscal year is—

(i) with respect to the performance measures described in subparagraphs (A), (B), and (C) of paragraph (4), the State collections base for the fiscal year; and

(ii) with respect to the performance measures described in subparagraphs (D) and (E) of paragraph (4), 75 percent of the State collections base for the fiscal year.

(B) Data required to be complete and reliable.—Notwithstanding subparagraph (A), the maximum incentive base amount for a State for a fiscal year with respect to a performance measure described in paragraph (4) is zero, unless the Secretary determines, on the basis of an audit performed under section 452(a)(4)(C)(i), that the data which the State submitted pursuant to section 454(15)(B) for the fiscal year and which is used to determine the performance level involved is complete and reliable.

(C) State collections base.—For purposes of subparagraph (A), the State collections base for a fiscal year is equal to the sum of—

(i) 2 times the sum of—

(I) the total amount of support collected during the fiscal year under the State plan approved under this part in cases in which the support obligation involved is required to be assigned to the State pursuant to part A or E of this title or title XIX; and

(II) the total amount of support collected during the fiscal year under the State plan approved under this part in cases in which the support obligation involved was so assigned but, at the time of collection, is not required to be so assigned; and

(ii) the total amount of support collected during the fiscal year under the State plan approved under this part in all other cases.