Note: Not a solution but marked as such to elevate a key reply
It hasn’t been previously mentioned in the so-far 20 posts in this topic, but the Bundles feature (Enterprise plans) facilitates the one-time definition of rules (and custom fields, task templates, etc.) for use in arbitrary new or existing projects.
Thanks,
Larry
Adding my voice to allow duplication of rules within a project.
Hi everyone, I’m excited to share we are working to bring Rules duplication to Asana projects soon 
We will share more details on its functionally close to launch.
Excited for this as new user! This is the #1 request from my team!
Delighted to see this feature is now in development!!
This would/will be an incredible feature! Albeit, one that should have been added years ago. My current project has multiple rules for building imaging and software testing tasks, each with hundreds of subtasks, that need to be recreated for all team members.
Is there an ETA?
I just duplicated my first rule 
I have this in my space! Anyone else?
I also have the option, but notice it only duplicates the top branch within the rule. I need to create the other branches manually. Still helpful, and hopefully why its still marked as ‘in development’?
Hi everyone, I’m happy to share that you can now duplicate or copy rules to other projects! Check out @Kelly_Perry4’s post with a recording showing this in action: 🥳 New: You can now duplicate or copy Rules to other projects!
Let us know if you have any questions or comments! 
Doing the feature launch dance!
