{"type": "object", "properties": {"CONTRACTYEAR": {"type": "integer", "examples": ["2026"], "minimum": 0, "maximum": 65535, "description": "Billing contract year"}, "WEEKNO": {"type": "integer", "examples": ["35", "39"], "minimum": 0, "maximum": 65535, "description": "Billing week no\nWARNING: There may be 53 weeks in a year, depending on how weeks align to the year start/end."}, "BILLRUNNO": {"type": "integer", "examples": ["8", "9"], "minimum": 0, "maximum": 65535, "description": "Billing run no"}, "LASTCHANGED": {"type": "string", "examples": ["2026/09/02 10:34:36"], "format": "date-time", "description": "Last changed date time"}}, "required": ["CONTRACTYEAR", "WEEKNO"], "description": "Carbon Dioxide Intensity Index publication tracking table"}