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10.8.60 IT Service Continuity Management (ITSCM) Policy and Guidance · 10.8.62 Information System Contingency Plan (ISCP) 10.23 Personnel Security. 5 Aug 2016 (1) This transmits revised IRM 10.23.1, Personnel Security. In accordance with Treasury Security Manual, TD P 15-71, Chapter I, Section 4,(13) IRM 1.11.2.6.1.3, Manual Transmittal Material Changes - Clarified that changes should be listed in subsection order and begin with the IRM subsection 9 Sep 2017 Internal Revenue Manual (IRM) - The primary, official source of instructions to employees relating to the organization, administration and 29 Apr 2019 10.23.2.2 General Investigative Requirements. 10.23.2.2.1 .. Treasury Security Manual (TSM), TD P 15-71, Chapter II, Section 2, Investigative