case of an eligible employer, the specified disaster-damaged business wage credit for any taxable year is an amount equal to 40 percent of the qualified wages for such year. (b) Qualified wages defined For purposes of this section— (1) In general The term qualified wages means, with respect to any covered employee, wages paid or incurred by the eligible employer to the employee who is not able to work at the disaster-damaged business of the employer during an inoperability period because of a federally declared disaster. Such term shall not include amounts paid or incurred for overtime compensation. (2) Limitations (A) Limitation on wages taken into account The amount of the qualified wages with respect to any individual which may be taken into account with respect to a federally declared disaster shall not exceed $6,000. (B) Inoperability period The inoperability period with respect to a federally declared disaster is the period beginning with the first day the trade or business is rendered inoperable due to damage from the federally declared disaster and ending on the earlier of— (i) the last day on which the trade or business is inoperable, or (ii) 16 weeks after the first day of such disaster. (c) Definitions For purposes of this section— (1) Eligible employer (A) In general The term eligible employer means, with respect to any taxable year, any employer which— (i) employed an average of less than 200 employees on business days during such taxable year, and (ii) has a disaster-damaged business. (B) Disaster-damaged business The term disaster-damaged business means a place of business within a disaster area which is rendered inoperable due to damage from the federally declared disaster. (C) Controlled groups For purposes of this section, all persons treated as a single employer under subsection (b), (c), (m), or (o) of section 414 shall be treated as a single employer. (2) Covered employee The term covered employee means, with respect to an eligible employer, an individual— (A) whose principal place of