Templates are backend coding used across the wiki for article layouts, notes at tops and bottoms, quick categories, and a myriad of other needs that make it so information can be put down with short code rather than a full typing of data every time.
Editing a template edits it across every article it is on. This makes them highly sensitive and so they are tightly regulated by Admin and Content Moderators only.
The policy is short and simple. Do not edit Templates unless you are admin or content moderator. Typos and small mistakes are fine. Any other changes whatsoever are not in the realm to touch or anyone else's call to make.
Deleting, editing, modifying, or otherwise messing with any template will result in an immediate one month ban, with subsequent violations escalating up to a permanent ban.