In general— In the case of an employee of any employer, including any Federal Government employer, the withholding and payment of the tax imposed by
section 3101(a) of the Internal Revenue Code of 1986, and so much of the tax imposed by section 3201 of such Code as is attributable to the rate in effect under such section 3101(a), with respect to such employee shall not be deferred pursuant to section 7508A of such Code for any pay period ending after the date of the enactment of this Act, unless the employee provides written consent to such deferral to the employer.