Below is the basic structure needed for a Named Seasonal Ratings submission:
{
    "proposal-header": {
        "source": {
            "provider": "see LEP User Guide for guidance",
            "last-updated": "see LEP User Guide for guidance",
            "origin-id": "see LEP User Guide for guidance"
        },
        "default-emergency-durations": [
            {
                "name": "LTE",
                "duration-minutes": 240
            },
            {
                "name": "STE",
                "duration-minutes": 15
            },
            {
                "name": "DAL",
                "duration-minutes": 5
            }
        ],
        "power-system-resources": [
            {
                "resource-id": "see LEP User Guide for guidance"
            }
        ]
    },
    "ratings": [
        {
            "resource-id": "see LEP User Guide for guidance",
            "periods": [
                {
                    "season-name": "see LEP User Guide for guidance",
                    "continuous-operating-limit": {
                        "mva": value
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": value
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": value
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": value
                            }
                        }
                    ]
                }
            ]
        }
    ]
}


Below is an example created on 25 July 2025. The "resource-id" header setting: (“X-LEP-Name-Type”, “NETMOMCompositeId”)
{
    "proposal-header": {
        "source": {
            "provider": "50184",
            "last-updated": "2025-03-27T15:33:03.861120350Z",
            "origin-id": "ISO-NE_API_Script_generation_tool/season_create_script"
        },
        "default-emergency-durations": [
            {
                "name": "LTE",
                "duration-minutes": 240
            },
            {
                "name": "STE",
                "duration-minutes": 15
            },
            {
                "name": "DAL",
                "duration-minutes": 5
            }
        ],
        "power-system-resources": [
            {
                "resource-id": "COLESON.NB_3009.A.NB_3009-CC"
            }
        ]
    },
    "ratings": [
        {
            "resource-id": "COLESON.NB_3009.A.NB_3009-CC",
            "periods": [
                {
                    "season-name": "JAN",
                    "continuous-operating-limit": {
                        "mva": 974
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 995
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1418
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1447
                            }
                        }
                    ]
                },
                {
                    "season-name": "FEB",
                    "continuous-operating-limit": {
                        "mva": 973
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 994
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1417
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1446
                            }
                        }
                    ]
                },
                {
                    "season-name": "MAR",
                    "continuous-operating-limit": {
                        "mva": 972
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 993
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1416
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1445
                            }
                        }
                    ]
                },
                {
                    "season-name": "APR",
                    "continuous-operating-limit": {
                        "mva": 970
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 991
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1414
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1443
                            }
                        }
                    ]
                },
                {
                    "season-name": "MAY",
                    "continuous-operating-limit": {
                        "mva": 969
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 990
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1413
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1442
                            }
                        }
                    ]
                },
                {
                    "season-name": "JUN",
                    "continuous-operating-limit": {
                        "mva": 969
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 990
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1413
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1442
                            }
                        }
                    ]
                },
                {
                    "season-name": "JUL",
                    "continuous-operating-limit": {
                        "mva": 968
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 989
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1412
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1441
                            }
                        }
                    ]
                },
                {
                    "season-name": "AUG",
                    "continuous-operating-limit": {
                        "mva": 969
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 990
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1413
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1442
                            }
                        }
                    ]
                },
                {
                    "season-name": "SEP",
                    "continuous-operating-limit": {
                        "mva": 969
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 990
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1413
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1442
                            }
                        }
                    ]
                },
                {
                    "season-name": "OCT",
                    "continuous-operating-limit": {
                        "mva": 971
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 992
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1415
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1444
                            }
                        }
                    ]
                },
                {
                    "season-name": "NOV",
                    "continuous-operating-limit": {
                        "mva": 973
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 994
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1417
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1446
                            }
                        }
                    ]
                },
                {
                    "season-name": "DEC",
                    "continuous-operating-limit": {
                        "mva": 975
                    },
                    "emergency-operating-limits": [
                        {
                            "duration-name": "LTE",
                            "limit": {
                                "mva": 996
                            }
                        },
                        {
                            "duration-name": "STE",
                            "limit": {
                                "mva": 1419
                            }
                        },
                        {
                            "duration-name": "DAL",
                            "limit": {
                                "mva": 1448
                            }
                        }
                    ]
                }
            ]
        }
    ]
}