Amount withheld from annuity payments or sick pay
If a payee makes a request that an annuity or any sick pay be subject to withholding under this chapter, the amount to be deducted and withheld under this chapter from any payment to which such request applies shall be an amount (not less than a minimum amount determined under regulations prescribed by the Secretary) specified by the payee in such request. The amount deducted and withheld with respect to a payment which is greater or less than a full payment shall bear the same relation to the specified amount as such payment bears to a full payment.