/lib/udev/rules.d/97-bluetooth.rules is in bluez 4.99-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | # Run helper every time a Bluetooth device appears
# On remove actions, bluetoothd should go away by itself
ACTION=="add", SUBSYSTEM=="bluetooth", RUN+="/lib/udev/bluez-udev --udev"
ACTION=="change", SUBSYSTEM=="bluetooth", RUN+="/lib/udev/bluez-udev --udev"
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