EPSG:4202

BOUNDCRS[
    SOURCECRS[
        GEOGCRS["AGD66",
            DATUM["Australian Geodetic Datum 1966",
                ELLIPSOID["Australian National Spheroid",6378160,298.25,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Geodesy."],
                AREA["Australia - onshore and offshore. Papua New Guinea - onshore."],
                BBOX[-47.2,109.23,-1.3,163.2]],
            ID["EPSG",4202]]],
    TARGETCRS[
        GEOGCRS["GDA94",
            DATUM["Geocentric Datum of Australia 1994",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Horizontal component of 3D system."],
                AREA["Australia including Lord Howe Island, Macquarie Island, Ashmore and Cartier Islands, Christmas Island, Cocos (Keeling) Islands, Norfolk Island. All onshore and offshore."],
                BBOX[-60.55,93.41,-8.47,173.34]],
            ID["EPSG",4283]]],
    ABRIDGEDTRANSFORMATION["AGD66 to GDA94 (10)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","SEAust_21_06_00.gsb"],
        USAGE[
            SCOPE["Transformation of coordinates at 0.1m level of accuracy."],
            AREA["Australia - Australian Capital Territory, New South Wales, Victoria."],
            BBOX[-39.2,140.96,-28.15,153.69]],
        ID["EPSG",1596],
        REMARK["Replaces AGD66 to GDA94 (5) (code 1464). Replaced by AGD66 to GDA94 (11) (code 1803). Input expects longitudes to be positive west; EPSG GeogCRS AGD66 (code 4202) and GDA94 (code 4283) both have longitudes positive east."]]]

proj4.defs("EPSG:4202","+proj=longlat +ellps=aust_SA +no_defs +type=crs");

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "AGD66",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Australian Geodetic Datum 1966",
            "ellipsoid": {
                "name": "Australian National Spheroid",
                "semi_major_axis": 6378160,
                "inverse_flattening": 298.25
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4202
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "GDA94",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Geocentric Datum of Australia 1994",
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4283
        }
    },
    "transformation": {
        "name": "AGD66 to GDA94 (10)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "SEAust_21_06_00.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 1596
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=aust_SA +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=aust_SA +no_defs +type=crs">
	</Layer>
</Map>