> ## Documentation Index
> Fetch the complete documentation index at: https://docs.czautoz.co.uk/llms.txt
> Use this file to discover all available pages before exploring further.

# Engine Lock & Licensing

> How CZ Autoz / Callatic vehicles are licensed — a standalone, server-side engine whitelist lock that needs no Community Framework, with a per-mod server-IP whitelist — each pack, tier, vehicle and the helicopter mod whitelisted on its own.

CZ Autoz vehicles are licensed by your **public server IP**. The check is entirely **server-side** and standalone — there is no client setup and **no Community Framework** involved.

## How the lock behaves

<CardGroup cols={2}>
  <Card title="Spawns anywhere" icon="car">
    On any server the vehicles spawn, persist and can be looted or sold as normal.
  </Card>

  <Card title="Engine gated by licence" icon="key">
    The **engine only starts on a whitelisted server**. Unlicensed, the vehicle simply won't drive.
  </Card>
</CardGroup>

<Note>
  This means an un-whitelisted server never sees broken or missing vehicles — they're all there, they just can't be driven until the server IP is registered.
</Note>

## Per-mod whitelisting

Each CZ Autoz mod is whitelisted **on its own** — there's a separate server-IP whitelist for:

* **Each** vehicle pack, tier and standalone single-vehicle mod
* The CZ Autoz **helicopter** mod

Whitelist each mod you run via the #ip-whitelisting bot, or use **submit-all** to whitelist everything you own at once. See [Whitelisting](/vehicles/whitelisting) to register your IP.

## No Community Framework

As of the DayZ 1.29 release the vehicles are **fully standalone**. You can remove `@CF` from your load order unless another mod still needs it — removing it has no effect on CZ Autoz vehicles.

## Checking licence status

Every CZ Autoz vehicle (and the helicopter mod) writes its status to one shared, date-stamped log on the server:

```
$profile:\CZAutoz_Whitelist_YYYY-MM-DD.log
```

Each line is timestamped and tagged with the mod, so you can confirm at a glance whether all your CZ Autoz content is licensed:

```
18:00:01 | [BMW X6M] WHITELISTED (203.0.113.10:2302). Vehicle enabled.
18:00:01 | [Tier 4] NOT WHITELISTED. Engine disabled.
```

<Warning>
  If your server **IP changes** — a new host, a new box, or a dynamic IP — you must **re-whitelist** the new IP or the engines will stop starting. See [Common Issues](/vehicles/common-issues).
</Warning>