/lib/udev/rules.d/60-libnxt.rules is in libnxt 0.3-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | # NXT 2.0 brick
SUBSYSTEM=="usb", ACTION=="add", ATTR{idVendor}=="0694", ATTR{idProduct}=="0002", \
MODE="0660", GROUP="plugdev", SYMLINK+="nxt-%k", \
ENV{ID_LEGO_MINDSTORMS}="1", TAG+="uaccess"
# NXT 2.0 brick in flash mode
SUBSYSTEM=="usb", ACTION=="add", ATTR{idVendor}=="03eb", \
MODE="0660", GROUP="plugdev", \
ENV{ID_LEGO_MINDSTORMS}="1", TAG+="uaccess"
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