{"type": "object", "properties": {"CONTRACTID": {"type": "string", "description": "Contract Identifier"}, "EFFECTIVEDATE": {"type": "string", "examples": ["2026/01/20 00:05:00"], "format": "date-time", "description": "Market date of offer\nWARNING: Despite what the name suggests, this is a datetime, not a date."}, "PERIODID": {"type": "integer", "maximum": 32767, "minimum": -32768, "description": "Market day trading interval number"}, "VERSIONNO": {"type": "integer", "minimum": 0, "maximum": 65535, "description": "Version no of record"}, "AGCDOWN": {"type": "integer", "maximum": 32767, "minimum": -32768, "description": "AGC Ramp Rate Down. This is used by SPD."}, "AGCUP": {"type": "integer", "maximum": 32767, "minimum": -32768, "description": "AGC Ramp Rate Up. This is used by SPD."}, "AUTHORISEDBY": {"type": "string", "description": "Authorised by"}, "AUTHORISEDDATE": {"type": "string", "examples": ["2026/01/20 00:05:00"], "format": "date-time", "description": "Authorised date\nWARNING: Despite what the name suggests, this is a datetime, not a date."}, "AVAILABILITY": {"type": "boolean", "description": "Availability flag (0 or 1)"}, "FILENAME": {"type": "string", "description": "Name of reoffer file"}, "LASTCHANGED": {"type": "string", "examples": ["2026/01/20 00:05:00"], "format": "date-time", "description": "Last date and time record changed"}, "LOWERLIMIT": {"type": "integer", "maximum": 32767, "minimum": -32768, "description": "Lower control limit MW. This is used by SPD."}, "UPPERLIMIT": {"type": "integer", "maximum": 32767, "minimum": -32768, "description": "Upper control limit. This is used by SPD."}}, "required": ["CONTRACTID", "EFFECTIVEDATE", "PERIODID", "VERSIONNO"], "description": "OFFERAGCDATA shows availability reoffers of Automatic Generation Control.\nOFFERAGCDATA data is confidential to the relevant participant.\n\nSource\n\nOFFERAGCDATA updates as reoffers submitted.\nWarningLevel.TIP: 1 second, 6 second, 5 minute, 60 second and regulation refer to types of [FCAS](../../guide/market_design.md#what-is-fcas) markets."}