> For the complete documentation index, see [llms.txt](https://docs.wellcomecollection.org/sensitivity-and-access-procedures/MlCudwyUwusoQqpgXspq/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wellcomecollection.org/sensitivity-and-access-procedures/MlCudwyUwusoQqpgXspq/managing-access/undertaking-sensitivity-review/restriction-and-closure-periods.md).

# Restriction and closure periods

All **Closed** or **Restricted** material has that status for a finite period of time, based on an assumed lifespan or 100 years. 

{% hint style="warning" %}
No material should be closed or restricted indefinitely: every item needs an expiry date. 
{% endhint %}

See the [public access procedures](https://wellcomecollection.cdn.prismic.io/wellcomecollection/86cda736-bfa1-44f2-bdda-11345632ce27_Wellcome+Collection+Access+Procedures+January+2022.pdf#page=17) for details about closure and restriction periods commonly used.