[Code of Federal Regulations] [Title 26, Volume 15] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 26CFR31.3231(d)-1] [Page 148] TITLE 26--INTERNAL REVENUE CHAPTER I--INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) PART 31_EMPLOYMENT TAXES AND COLLECTION OF INCOME TAX AT SOURCE--Table of Contents Subpart C_Railroad Retirement Tax Act (Chapter 22, Internal Revenue Code of 1954) Sec. 31.3231(d)-1 Service. See Sec. 31.3231(b)-1 for regulations relating to the term ``in the service of an employer.''