{
    "coverage": {
        "US Census": {
            "geoid": "49",
            "state": "Utah"
        },
        "country": "us",
        "state": "ut"
    },
    "contact": {
        "name": "AGRC",
        "title": "Office Email",
        "phone": "801-538-3665",
        "email": "agrc@utah.gov"
    },
    "language": "en",
    "website": "https://gis.utah.gov/data/location/address-data/#AddressPoints",
    "data": "https://opendata.arcgis.com/datasets/3f4f7a8efcd147febeca8bacaea67a14_0.geojson",
    "note": {
        "update frequency": "monthly"
    },
    "license": "https://creativecommons.org/licenses/by/4.0/",
    "protocol": "http",
    "conform": {
        "srs": "EPSG:102100",
        "format": "geojson",
        "number": {
            "function": "join",
            "fields": [
                "AddNum",
                "AddNumSuffix"
            ]
        },
        "street": {
            "function": "join",
            "fields":[
                "PrefixDir",
                "StreetName",
                "StreetType",
                "SuffixDir"
            ]
        },
        "unit": {
            "function": "join",
            "fields": [
                "UnitType",
                "UnitID"
            ]
        },
        "city": "City",
        "district": "CountyID",
        "region": "State",
        "postcode": "ZipCode",
        "id": "UTAddPtID"
    }
}

{
    "coverage": {
        "US Census": {
            "geoid": "49",
            "state": "Utah"
        },
        "country": "us",
        "state": "ut"
    },
    "contact": {
        "name": "AGRC",
        "title": "Office Email",
        "phone": "801-538-3665",
        "email": "agrc@utah.gov"
    },
    "language": "en",
    "website": "https://gis.utah.gov/data/location/address-data/#AddressPoints",
    "data": "https://opendata.arcgis.com/datasets/3f4f7a8efcd147febeca8bacaea67a14_0.geojson",
    "note": {
        "update frequency": "monthly"
    },
    "license": "https://creativecommons.org/licenses/by/4.0/",
    "protocol": "http",
    "conform": {
        "srs": "EPSG:102100",
        "format": "geojson",
        "number": [
            "AddNum",
            "AddNumSuffix"
        ],
        "street": [
            "PrefixDir",
            "StreetName",
            "StreetType",
            "SuffixDir"
        ],
        "unit": [
            "UnitType",
            "UnitID"
        ],
        "city": "City",
        "district": "CountyID",
        "region": "State",
        "postcode": "ZipCode",
        "id": "UTAddPtID"
    }
}

Use an array instead of calling the "join" function
Use an array instead of calling the "join" function