In general
The term “lump-sum distribution” means the distribution or payment within one taxable year of the recipient of the balance to the credit of an employee which becomes payable to the recipient—
(I)#
on account of the employee’s death,
(II)#
after the employee attains age 59½,
(III)#
on account of the employee’s separation from service, or
(IV)#
after the employee has become disabled (within the meaning of section 72(m)(7)),