I can’t find any way to turn off a rule within a project. I am admin of our Asana, as well as owner of the project however one person has made a rule which I am unable to turn off.
Help! How do I do this?
Happy Thursday @Frankie_Ring 
As it stands, only the owner of the Rule can pause or delete it. You can learn more about it in the following guide article: https://asana.com/guide/help/premium/rules#gl-rule-considerations
There is an existing thread in the #productfeedback category regarding this topic. Allow other users to edit an automation rule.. I would recommend you to add your comment and vote.
Apologies for not being of a greater help here Frankie! Please let me know if you have any follow-up question!