DCEO 01/31/2006. 2. Purpose of Letter No. 05-PL-11. Provide guidance to implement new waiver authority granted to Illinois by DOL allowing diversion of 10% of local WIA allocations to train incumbent workers.Help EDRs, LWIAs, and LWIBs develop a full continuum of workforce services for the unemployed, underemployed, and new entrants to the labor force..