{"type": "object", "properties": {"BILLRUNNO": {"type": "integer", "examples": ["8", "996"], "minimum": 0, "maximum": 65535, "description": "Unique run no within a given contract year and week no"}, "CONTRACTYEAR": {"type": "integer", "examples": ["2026"], "minimum": 0, "maximum": 65535, "description": "AEMO Contract Year number starting in week containing 1st January"}, "SETTLEMENTDATE": {"type": "string", "examples": ["2026/02/01 00:00:00"], "format": "date-time", "description": "Calendar Settlement Date contained in the billing run."}, "WEEKNO": {"type": "integer", "examples": ["6", "40"], "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."}, "LASTCHANGED": {"type": "string", "examples": ["2026/08/24 09:31:10"], "format": "date-time", "description": "Last date and time record changed"}, "RUNNO": {"type": "integer", "examples": ["1", "11"], "minimum": 0, "maximum": 65535, "description": "Settlement run number used for each settlement date in that billing run."}}, "required": ["BILLRUNNO", "CONTRACTYEAR", "SETTLEMENTDATE", "WEEKNO"], "description": "BILLINGDAYTRK is key for matching settlement versions with billing runs. BILLINGDAYTRK displays the billrunnos per billing week, and the settlement version numbers per settlement day comprising the billrunno.\nBILLINGDAYTRK is public data, and is available to all participants.\n\nSource\n\nBILLINGDAYTRK is populated by the posting of a billing run, being\nseveral times each week.\n\nVolume\n\nEach billing run inserts approximately 7 records, being about 77 records\nper week."}