/lib/udev/rules.d/99-wispy.rules is in spectools 201108r1-3.
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 | # Two vid/pid pairs for Wispy1 USB dongle
ATTRS{idVendor}=="1781", ATTRS{idProduct}=="083e", MODE="0660", GROUP="plugdev"
ATTRS{idVendor}=="04b4", ATTRS{idProduct}=="0bad", MODE="0660", GROUP="plugdev"
ATTRS{idVendor}=="1781", ATTRS{idProduct}=="083f", MODE="0660", GROUP="plugdev"
ATTRS{idVendor}=="1dd5", ATTRS{idProduct}=="5000", MODE="0660", GROUP="plugdev"
ATTRS{idVendor}=="1dd5", ATTRS{idProduct}=="2400", MODE="0660", GROUP="plugdev"
ATTRS{idVendor}=="1dd5", ATTRS{idProduct}=="0900", MODE="0660", GROUP="plugdev"
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