Automatic Contribution Arrangements (US Internal Revenue Service Regulation) (IRS) (2018 Edition) The Law Library presents the complete text of the Automatic Contribution Arrangements (US Internal Revenue Service Regulation) (IRS) (2018 Edition). Updated as of May 29, 2018 This document contains final regulations relating to automatic contribution arrangements. These regulations affect administrators of, employers maintaining, participants in, and beneficiaries of section 401(k) plans and other eligible plans that include an automatic contribution arrangement. This book contains: - The complete text of the Automatic Contribution Arrangements (US Internal Revenue Service Regulation) (IRS) (2018 Edition) - A table of contents with the page number of each section