This file is indexed.

/lib/udev/rules.d/40-gnupg.rules is in gnupg 1.4.11-3ubuntu2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# do not edit this file, it will be overwritten on update

SUBSYSTEM!="usb", GOTO="gnupg_rules_end"
ACTION!="add", GOTO="gnupg_rules_end"

# USB SmartCard Readers
## SCM readers (SCR335, SPR532, & Co)
ATTR{idVendor}=="04e6", ATTR{idProduct}=="e001", ENV{ID_SMARTCARD_READER}="1", ENV{ID_SMARTCARD_READER_DRIVER}="gnupg"
ATTR{idVendor}=="04e6", ATTR{idProduct}=="e003", ENV{ID_SMARTCARD_READER}="1", ENV{ID_SMARTCARD_READER_DRIVER}="gnupg"
ATTR{idVendor}=="04e6", ATTR{idProduct}=="5115", ENV{ID_SMARTCARD_READER}="1", ENV{ID_SMARTCARD_READER_DRIVER}="gnupg"

LABEL="gnupg_rules_end"