{"type": "object", "properties": {"BILLRUNNO": {"type": "integer", "minimum": 0, "maximum": 65535, "description": "The sequential number of a billing run"}, "CONTRACTYEAR": {"type": "integer", "minimum": 0, "maximum": 65535, "description": "SRA Contracted Year (calendar year)"}, "FROMREGIONID": {"type": "string", "enum": ["QLD1", "VIC1", "TAS1", "NSW1", "SA1"], "description": "Nominated source region for Interconnector"}, "INTERCONNECTORID": {"type": "string", "description": "Contracted Interconnector"}, "PARTICIPANTID": {"type": "string", "description": "Unique participant identifier"}, "QUARTER": {"type": "integer", "maximum": 127, "minimum": -128, "description": "Residue Contract Quarter"}, "RESIDUEYEAR": {"type": "integer", "maximum": 32767, "minimum": -32768, "description": "Year of the Residue Contract; may differ from the calendar year at week 1."}, "WEEKNO": {"type": "integer", "minimum": 0, "maximum": 65535, "description": "Week no within the contract year. Week no 1 is the week containing 1st January\nWARNING: There may be 53 weeks in a year, depending on how weeks align to the year start/end."}, "ACTUALPAYMENT": {"type": "number", "description": "Net payment to participant, including auction fees"}, "AUCTIONFEES": {"type": "number", "description": "Total auction fees payable in this week (negative amount). If AUCTIONFEES + AUCTIONFEES_GST >= TOTALSURPLUS then ACTUALPAYMENT is zero."}, "AUCTIONFEES_GST": {"type": "number", "description": "The GST amount on the auction fees, always being zero."}, "AUCTIONFEES_TOTALGROSS_ADJ": {"type": "number", "description": "The adjusted total Auction fees for the Directional Interconnector. Calculated as the amount of the total fees due from the SRA Auction Participant, pro-rated based on the total surplus for each Directional Interconnector the SRA Auction Participant contracted."}, "CSP_DEROGATION_AMOUNT": {"type": "number", "description": "The CSP derogation amount applied as an adjustment to SRA."}, "LASTCHANGED": {"type": "string", "examples": ["2026/01/20 00:05:00"], "format": "date-time", "description": "Date and time this record was last modified"}, "TOTALSURPLUS": {"type": "number", "description": "Total residue amount allocated to participant"}, "UNADJUSTED_IRSR": {"type": "number", "description": "The SRA amount unadjusted by CSP."}}, "required": ["BILLRUNNO", "CONTRACTYEAR", "FROMREGIONID", "INTERCONNECTORID", "PARTICIPANTID", "QUARTER", "RESIDUEYEAR", "WEEKNO"], "description": "BILLINGIRPARTSURPLUSSUM supports the Settlements Residue Auction, by showing the weekly billing SRA distribution and associated fees to Auction participants.\nBILLINGIRPARTSURPLUSSUM data is confidential to the relevant\nparticipant.\n\nSource\n\nBILLINGIRPARTSURPLUSSUM is populated by the posting of a billing run\nwhere the participant has purchased auction units relating to that\nbilling run.\n\nVolume\n\nAn indicative maximum is 16 records inserted per billing run, or 166\nrecords inserted per week."}