I don’t know what the current limit is - perhaps @uckelman can elaborate.
It is hard to give a boiler plate as it depends very much on the module in question. First, check the considerations on How to upload a module. A good idea is to add a section - say Copyright and License to the project README.
Suppose you have a module that
- Uses third-party graphics
- Contains a copy of third-party rules
but otherwise is entirely developed by NN. Assuming you have obtained a license to use the third-party copyrightable materials from company Ajax Games, and you also have obtained a license to redistribute those materials, then a Copyright and License section could be
## Copyright and License
All graphics and rules texts are © 2026 of Ajax Games. These are used by permission of Ajax Games who has also granted permission to redistribute these materials with this module.
All other materials are © 2026 of NN.
Permission to use, copy, and redistribute for personal use, free of charge, is granted by Ajax Games and NN.
If the third party materials are granted license to use only under certain conditions - e.g., like GMT Games which requres at least one player to have a physical copy, or if the materials can only be used for personal use (i.e., not in clubs, conventions, or similar), then that should be stipulated as part of the conditions. Take, for example Italy '43 released by GMT Games. A Copyright and License section could read
## Copyright and License
Graphics (maps, counters, tables, etc.) as well as rules snippets are © 2025 of GMT Games.
Other module developments © 2025 of Nigel Rabbetts.
GMT Games grants permission to non-commercial, personal use of their copyrighted materials provided _at least_ one player owns a physical copy of the game - see also their [FAQ](https://www.gmtgames.com/t-faq.aspx) (at the very bottom).
Note, if no permission has been given - implicitly or explicitly, for example as a license - then it is illegal (in those jurisdictions where the international convention is ratified) to distribute copyrighted materials.
Yours,
Christian