Excerpt: The changes represent dramatic new responsibilities in oversight and administration that had been 'virtually nonexistent' for district business officials, said John Kevin, the investment officer for the 139,000-student Montgomery County, Md., school system. The impact of the new IRS rules, which became final in July 2007, will be felt far beyond district business offices. Teachers and other employees may find their investment choices limited as their districts, for simplicity's sake, seek to scale down the number of investment companies allowed to offer their plans.  MORE >>