General rule
For purposes of this chapter (and so much of subtitle F as relates to this chapter)—
(A) any supplemental unemployment compensation benefit paid to an individual,
(B) any payment of an annuity to an individual, if at the time the payment is made a request that such annuity be subject to withholding under this chapter is in effect, and
(C) any payment to an individual of sick pay which does not constitute wages (determined without regard to this subsection), if at the time the payment is made a request that such sick pay be subject to withholding under this chapter is in effect,
shall be treated as if it were a payment of wages by an employer to an employee for a payroll period.