Move:
When moving an object, it keeps the original ACL of the object.
Copy and paste:
The copied and pasted object inherits its parent folder's ACL as well as the user who performs the 'copy and paste'.
Create a new object and save:
It inherits its parent folder's ACL, as well as the object creator in ACL.
Run a report and Save As:
It inherits its parent folder's ACL, as well as the user who runs and saves it.
Edit an object and Save:
The existing ACL will not be changed. The object maintains its own ACL.
KB18207