as if such plan or contract amendment were in effect, and (ii) such plan or contract amendment applies retroactively for such period. 203. Employee retention credit for employers affected by qualified disasters (a) In general For purposes of section 38 of the Internal Revenue Code of 1986, in the case of an eligible employer, the 2018 qualified disaster employee retention credit shall be treated as a credit listed at the end of subsection (b) of such section. For purposes of this section, the 2018 qualified disaster employee retention credit for any taxable year is an amount equal to 40 percent of the qualified wages with respect to each eligible employee of such employer for such taxable year. The amount of qualified wages with respect to any employee which may be taken into account under this section by the employer for any taxable year shall not exceed $6,000 (reduced by the amount of qualified wages with respect to such employee which may be so taken into account for any prior taxable year). (b) Definitions For purposes of this section— (1) Eligible employer The term eligible employer means any employer— (A) which conducted an active trade or business in a qualified disaster zone at any time during the incident period of the qualified disaster with respect to such qualified disaster zone, and (B) with respect to whom the trade or business described in subparagraph (A) is inoperable at any time on or after the first day of the incident period of such qualified disaster, and before January 1, 2019, as a result of damage sustained by reason of such qualified disaster. (2) Eligible employee The term eligible employee means with respect to an eligible employer an employee whose principal place of employment with such eligible employer (determined immediately before the qualified disaster referred to in paragraph (1)) was in the qualified disaster zone referred to in such paragraph. (3) Qualified wages The term qualified wages means wages (as defined in section 51(c)(1) of the Internal Revenue Code of 1986, but