US lawIllinoisRegulationsTitle 56 — LABOR AND EMPLOYMENTCHAPTER IV: DEPARTMENT OF EMPLOYMENT SECURITYSUBCHAPTER c: RIGHTS AND DUTIES OF EMPLOYERSPart 2770 — DETERMINATION OF UNEMPLOYMENT CONTRIBUTIONSSubpart C2770.40556 Ill. Adm. Code 2770.405Application Of Base Period Wages (Repealed)Last amended: 1991Year: 2026Length: 10 wordsOfficial source Section 2770 Section 2770.405 Application Of Base Period Wages (Repealed)Previous56 Ill. Adm. Code 2770.400Next56 Ill. Adm. Code 2770.410