# Updating FATES within a Host Land Model

This page guides the developer on the steps to updating and testing changes made to FATES that require HLM testing.  This can include:
- Updating the HLM to use a different FATES tag
- Updating the HLM-FATES API to coordinate changes necessary across both repositories


## CTSM
Noting what one needs to do to change the FATES version pointed to in a CTSM clone.

* Page for updating FATES in CTSM https://github.com/ESCOMP/ctsm/wiki/Protocols-on-updating-FATES-within-CTSM

## E3SM

To be written.