Risk Acceptance and Safety Documentation Review  Section 6  8 2  6.1_SMSM_201904  Originally published April 2019  Uncontrolled copy when downloaded (1) The change proponent must ensure that the SRM documents are entered into the ATO Safety Management Tracking System (SMTS) for tracking and monitoring the status of NAS changes. (2) Signature responsibility may only be delegated from a Director to a Deputy Director. (3) The changes that require Air Traffic Safety Oversight Service (AOV) approval are listed in FAA Order 1100.161,  Air Traffic Safety Oversight . If there is an initially identified high-risk hazard, AOV must approve the means to reduce safety risk and the Headquarters Director of Operations or Technical Operations Service Area Director and the ATO Chief Safety Engineer (8) must sign the document. (4) The proponent of an air traffic change must send an informational copy of the SRM document to the Director of Air Traffic Operations (Service Area) before submitting the SRM document to the ATO Chief Safety Engineer for approval. (5) In cases where medium or low safety risk and/or controls go outside of the ATO, the mitigations must be approved by the designated management officials within the other Lines of Business (LOBs) and accepted by AOV. (6) If a facility does not have a Support Manager, the District Manager or General Manager of the affected facility shall designate an SRM document approver. Notes:  Type of  Change  Requires AOV  Approval/Acceptance?  (3)  Initial  Predicted  Risk Level  Required SRM  Document Approval  Signatures (4)  Required Safety Risk  Acceptance  Signatures  National  Yes/No  Low/Medium  (5)  Headquarters Group  Manager of the change  proponent, ATO Chief  Safety Engineer (8) Headquarters  Director(s) of the  affected Service  Unit(s) High (7)  Headquarters  Director(s) of the  affected Service Unit(s),  ATO Chief Safety  Engineer (8)  Vice President(s) of  the affected Service  Unit(s) Acquisitions  Yes/No  Low/Medium  (5)  Director of Operational  Concepts, Validation &  Requirements; Director  of Program  Management  Organization; ATO  Chief Safety Engineer  (10) (11) Headquarters  Director(s) of the  affected Service  Unit(s) (12)  High (7)  Director of Operational  Concepts, Validation &  Requirements; Director  of Program  Management  Organization; ATO  Chief Safety Engineer  (10) (11) Vice President(s) of  the affected Service  Unit(s) (12)