To my best of knowledge, the ones in /etc/udev are supposed to be user maintainable and the ones in /lib/udev are supposed to come with the packges installed on the system.
Thanks Wouter,
This is in a fresh install, All those rule files come with the Stellarmate OS image...
Anyway, from your reply I understand that location is not critical and that the preferred location for my particular rules would be /etc/udev/...
Damn! I just copied them to /lib/udev...