17 codes that cover most of what an originator sees. Each one carries the decision: retry or stop, how long the receiving institution has to send it, what the guidance rests on, and when it was last checked.
On a rail fact, every detail line names the section or instrument it rests on and whether that is a rule, a law, operator guidance, or observed practice.
Not yet covered: the SIC IP hard time-out value and the operating detail of each status report type sit in the participant-only SIC Handbook, so no reject deadline is given; the three-digit SIC error codes carried by NOK acknowledgements are listed only in the participant-only SIC Handbook and have no records here; the ISO 20022 External Code Set definitions behind the permitted codes were not read, so meanings rest on the code names SIX prints; how a failed transfer payment from the SIC IP service is reported after release 5.3 is described only in an extranet document.