"Supplementary payment": The payment from the retired teachers' supplementary payment fund necessary to increase a retired teacher's service or disability retirement pension to the amount provided in Section 17-154.
40 ILCS 5/17-112
Supplementary payment
Laws 1963, p. 161.
Official source: Illinois General Assembly. Reproduced from public-domain Illinois statutes; confirm against the official source for the current text. Not legal advice.