diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9cbda53..204421a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 - [#508](https://github.com/mobilityhouse/ocpp/issues/508) Exception - OccurrenceConstraintViolationError doc string correction
 
 ## DEPRECATED ##
+- [#599](https://github.com/mobilityhouse/ocpp/issues/599) v1.6 Action Enum members corrected IMPORTANT SEE UPGRADE PATH [#599](https://github.com/mobilityhouse/ocpp/issues/599)
 - [#579](https://github.com/mobilityhouse/ocpp/issues/579) v2.0.1 Action enums corrected - IMPORTANT SEE UPGRADE PATH [#579](https://github.com/mobilityhouse/ocpp/issues/579)
 
 ## BREAKING ##
@@ -55,7 +56,6 @@
 - [#528](https://github.com/mobilityhouse/ocpp/issues/528) v2.0.1 CertificateHashDataChainType childCertificateHashData requires the default of None.
 - [#510](https://github.com/mobilityhouse/ocpp/issues/510) v2.0.1 UnitOfMeasureType - Enums missing and update docstring to allow use for variableCharacteristics.
 - [#508](https://github.com/mobilityhouse/ocpp/issues/508) Exception - OccurrenceConstraintViolationError doc string correction.
-
 - [#511](https://github.com/mobilityhouse/ocpp/issues/511) 2.0.1 Units of Measure update to match Appendix 2. Standardized Units Of Measure
 
 ## 0.22.0 (2023-11-03)
@@ -64,9 +64,7 @@
 - [#278](https://github.com/mobilityhouse/ocpp/pull/278) Fix types for attributes of OCPP 1.6's type `IdTagInfo`. Thanks [@chan-vince](https://github.com/chan-vince)
 - [#504](https://github.com/mobilityhouse/ocpp/pull/504) Add missing tech_info attribute to v2.0.1 EventDataType. Thanks [@LokiHokie](https://github.com/LokiHokie)
 - [#381](https://github.com/mobilityhouse/ocpp/issues/381) Add FormationError and OccurrenceConstraintViolationError.
-
 - [#373](https://github.com/mobilityhouse/ocpp/issues/373) v201.datatypes.ChargingNeedsType.request_energy_transfer is mistyped
-
 - [#207](https://github.com/mobilityhouse/ocpp/issues/207) v16/schemas/StopTransaction.json missing "Hertz"
 
 ## 0.21.0 (2023-10-19) 
diff --git a/ocpp/v16/enums.py b/ocpp/v16/enums.py
index 5cff041..e80175d 100644
--- a/ocpp/v16/enums.py
+++ b/ocpp/v16/enums.py
@@ -1,3 +1,5 @@
+from warnings import warn
+
 try:
     # breaking change introduced in python 3.11
     from enum import StrEnum
@@ -11,6 +13,14 @@ class StrEnum(str, Enum):  # pragma: no cover
 class Action(StrEnum):
     """An Action is a required part of a Call message."""
 
+    def __init__(self, *args, **kwargs):
+        warn(
+            message="Action enum contains deprecated members and will be removed in "
+            "the next major release, please use snake case members.",
+            category=DeprecationWarning,
+        )
+
+    # --------- Soon to be deprecated ---------------------
     Authorize = "Authorize"
     BootNotification = "BootNotification"
     CancelReservation = "CancelReservation"
@@ -51,6 +61,48 @@ class Action(StrEnum):
     UnlockConnector = "UnlockConnector"
     UpdateFirmware = "UpdateFirmware"
 
+    # --------------------------------------------------------
+
+    authorize = "Authorize"
+    boot_notification = "BootNotification"
+    cancel_reservation = "CancelReservation"
+    certificate_signed = "CertificateSigned"
+    change_availability = "ChangeAvailability"
+    change_configuration = "ChangeConfiguration"
+    clear_cache = "ClearCache"
+    clear_charging_profile = "ClearChargingProfile"
+    data_transfer = "DataTransfer"
+    delete_certificate = "DeleteCertificate"
+    diagnostics_status_notification = "DiagnosticsStatusNotification"
+    extended_trigger_message = "ExtendedTriggerMessage"
+    firmware_status_notification = "FirmwareStatusNotification"
+    get_composite_schedule = "GetCompositeSchedule"
+    get_configuration = "GetConfiguration"
+    get_diagnostics = "GetDiagnostics"
+    get_installed_certificate_ids = "GetInstalledCertificateIds"
+    get_local_list_version = "GetLocalListVersion"
+    get_log = "GetLog"
+    heartbeat = "Heartbeat"
+    install_certificate = "InstallCertificate"
+    log_status_notification = "LogStatusNotification"
+    meter_values = "MeterValues"
+    remote_start_transaction = "RemoteStartTransaction"
+    remote_stop_transaction = "RemoteStopTransaction"
+    reserve_now = "ReserveNow"
+    reset = "Reset"
+    security_event_notification = "SecurityEventNotification"
+    send_local_list = "SendLocalList"
+    set_charging_profile = "SetChargingProfile"
+    sign_certificate = "SignCertificate"
+    signed_firmware_status_notification = "SignedFirmwareStatusNotification"
+    signed_update_firmware = "SignedUpdateFirmware"
+    start_transaction = "StartTransaction"
+    status_notification = "StatusNotification"
+    stop_transaction = "StopTransaction"
+    trigger_message = "TriggerMessage"
+    unlock_connector = "UnlockConnector"
+    update_firmware = "UpdateFirmware"
+
 
 class AuthorizationStatus(StrEnum):
     """