ROC System: Can I Update an LOA that was Submitted with a Resp Org Change Request? November 03, 2022 16:54 Updated No, once the Resp Org Change (ROC) request has been submitted, the Letter of Agency (LOA) cannot be updated. Related articles ROC System: How do I Add Additional Related Documents via the RSB Page? ROC System Quick Start Guide ROC System: How do I Upload a ROC request's Generated LOA via the RLU Page? TFNRegistry API: How can I Obtain Access to the API? ROC System: Is there an Electronic LOA Template Available for Download?