[Code of Federal Regulations] [Title 20, Volume 1] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 20CFR229.52] [Page 465] TITLE 20--EMPLOYEES' BENEFITS CHAPTER II--RAILROAD RETIREMENT BOARD PART 229_SOCIAL SECURITY OVERALL MINIMUM GUARANTEE--Table of Contents Subpart F_Computation of the Overall Minimum Rate Sec. 229.52 Age reduction when a reduced age O/M is effective before DIB O/M. If an employee received a reduced age O/M before the effective date of a DIB O/M, the PIA amount for the DIB O/M is reduced as if the employee had attained retirement age on the effective date of the DIB O/ M.