/lib/udev/rules.d/99-x52pro.rules is in libx52pro0 0.1.1-2.3+b1.
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 | #X52 Flight System
ACTION=="add", SUBSYSTEMS=="usb", ATTRS{idVendor}=="06a3", ATTRS{idProduct}=="0255", MODE="660", GROUP="plugdev"
ACTION=="add", SUBSYSTEMS=="usb", ATTRS{idVendor}=="06a3", ATTRS{idProduct}=="075c", MODE="660", GROUP="plugdev"
#X52 Pro Flight System
ACTION=="add", SUBSYSTEMS=="usb", ATTRS{idVendor}=="06a3", ATTRS{idProduct}=="0762", MODE="660", GROUP="plugdev"
#Pro Flight Yoke System
ACTION=="add", SUBSYSTEM=="input", ATTR{idVendor}=="06a3", ATTR{idProduct}=="0bac", MODE="660", GROUP="plugdev"
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