(40 ILCS 5/17-111)
(from Ch. 108 1/2, par. 17-111)
"Reversionary pension": A pension computed on an actuarially equated
basis and payable to a contributor's beneficiary designated under a
prescribed option before retirement, commencing upon the death of the
contributor after retirement on pension and continuing thereafter during
the life of the beneficiary.
(Source: Laws 1963, p. 161.)