/lib/udev/rules.d/88-nuand.rules is in libbladerf0 0.9.0.15.8ba2499-1.
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 | # nuand bladeRF
ATTR{idVendor}=="1d50", ATTR{idProduct}=="6066", MODE="660", GROUP="plugdev"
# Reserved for future bladeRF-specific bootloader
ATTR{idVendor}=="1d50", ATTR{idProduct}=="6081", MODE="660", GROUP="plugdev"
# Cypress Bootloader
ATTR{idVendor}=="04b4", ATTR{idProduct}=="00f3", MODE="660", GROUP="plugdev"
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