40 ILCS 5/6-169
In lieu of salary deductions for annuity purposes, the city shall contribute sums equal to such amounts for any period during which a fireman received duty disability benefit or occupational disease disability benefit. The contributions shall be credited to the disabled fireman and shall be regarded for annuity purposes as sums contributed by the fireman.
The city shall also contribute amounts ordinarily contributed for annuity purposes for such fireman as though he were in active discharge of his duties during either such disability.
To provide widow's annuity in accordance with the benefits authorized in Section 6-140, the city shall contribute such sums annually, from the date of the fireman's death to provide said annuity to the widow for life.
40 ILCS 5/6-169