The Internal Revenue Service (IRS) is inviting public comments on the application of ACA rules prohibiting insured group health plans from discriminating in favor of highly-compensated individuals. Comments will be accepted until November 4, 2010. The IRS also has issued guidance on the ACA’s revised definition of medical expenses as it relates to over-the-counter drugs. The IRS invites comments on further guidance that may be needed in this area. Comments are due December 27, 2010.