# Plumbing — Licence

Copyright (c) 2026 Leith Document Company Limited. All rights reserved.

## Permission

You may use, copy, and distribute this software free of charge, but
only for Permitted Purposes as described below.

Any use that is not a Permitted Purpose requires a commercial licence
from Leith Document Company Limited. To enquire about commercial
licensing, contact licensing@leithdocs.com. We are happy to discuss
terms.

## Permitted Purposes

A **Permitted Purpose** is any use that meets all of the following
conditions:

1. The use is for personal learning, private study, hobby projects,
   academic teaching, or academic research.

2. The use is not part of, or in support of, delivering a product,
   service, or operational capability to any third party, whether or
   not payment is involved.

3. The use is not undertaken on behalf of, or funded by, any
   organisation for the purpose of evaluating the software for
   operational deployment.

For the avoidance of doubt:

- A researcher at a university using the software for research or
  teaching is a Permitted Purpose.

- The same researcher using the software as part of paid consulting
  work is not a Permitted Purpose.

- An individual experimenting with the software at home is a Permitted
  Purpose.

- A company or government body evaluating the software for
  operational use requires a commercial licence.

## Source Code

The source code of this software is not included in this distribution
and is not licensed under these terms.

## Redistribution

You may redistribute unmodified copies of this software, provided
that you include this licence text in its entirety with every copy.

You may not modify, reverse-engineer, decompile, or disassemble this
software, except to the extent that applicable law expressly permits
such activity notwithstanding this restriction.

## No Warranty

This software is provided "as is", without warranty of any kind,
express or implied. Leith Document Company Limited accepts no liability
for any loss or damage arising from the use or inability to use this
software, to the fullest extent permitted by law.

Nothing in this licence excludes or limits liability for death or
personal injury caused by negligence, for fraud, or for any other
liability that cannot be excluded or limited under the laws of
Scotland.

## General

This licence is governed by the laws of Scotland and the parties
submit to the exclusive jurisdiction of the Scottish courts.

If any provision of this licence is found to be unenforceable, the
remaining provisions continue in full force.

Leith Document Company Limited reserves the right to offer this software
under different terms, including free and open-source licences, at
its sole discretion.
