How to apply delete business rules to an object

I cannot find any way to define a business rule in an object, that protects against an unwanted delete.

Something like:

IF DELETING and Project.Status <> 'New' DISPLAY ERROR 'Can only delete a Status New Project'

I added this as a business rule to the ProjectApprovalStatusNote object.

if ProjectApprovalStatusNote.AddedBy<>LoggedInEmployee then PROTECT ProjectApprovalStatusNote FROM ALL EXCEPT Administrator

I then logged in as an Employee (Systemuser) different than ProjectApprovalStatusNote.AddedBy

I was able to delete a note created by another user, so the business rule DID NOT work, as coded.

There is a category of rules for when the object is deleted - check the manual