US lawIllinoisRegulationsTitle 80 — PUBLIC OFFICIALS AND EMPLOYEESCHAPTER III: TEACHERS' RETIREMENT SYSTEM OF THE STATE OF ILLINOISPart 1650 — THE ADMINISTRATION AND OPERATION OF THE TEACHERS' RETIREMENT SYSTEMSubpart E1650.42080 Ill. Adm. Code 1650.420Interest on Deficiencies (Repealed)Last amended: 1985Year: 2026Length: 8 wordsOfficial source Section 1650 Section 1650.420 Interest on Deficiencies (Repealed)Previous80 Ill. Adm. Code 1650.417Next80 Ill. Adm. Code 1650.430