whether the rules about merit can change?
why not, if the change is needed for the better in the future
why do you asking a change, do you feel frustrated to get it?
I suggest you don't discuss this just a wast of time , you better think how to get it. according to existing rules !
if you want a change give a good idea that is useful for this forum, Let those who are competent here take care of it.
success for you