/lib/udev/rules.d/60-libairspy0.rules is in libairspy0 1.0.9-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | SUBSYSTEM=="usb", ATTR{idVendor}=="1d50", ATTR{idProduct}=="60a1", SYMLINK+="airspy-%k", MODE="660", GROUP="plugdev"
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