Excerpt: With certain exceptions, the final regulations are applicable to limitation years beginning on or after July 1, 2007. For most plans, this means that the final regulations took effect as of January 1, 2008. Generally, plans are required to be amended to comply with the Section 415 final regulations. The plan amendments must be made by the employer's deadline for filing its income tax return (including extensions) for tax year 2008 (sometime in 2009).  MORE >>