URL     = "https://b24-ar17wx.bitrix24.by/rest/1/1o2...";
    FieldID = "259";

    Result = OPI_Bitrix24.GetCustomTaskField(URL, FieldID);

    URL     = "b24-ar17wx.bitrix24.by";
    Token   = "49e20867006e9f06006b12e400000001000...";
    FieldID = "261";

    Result = OPI_Bitrix24.GetCustomTaskField(URL, FieldID);