/lib/udev/rules.d/50-apport.rules is in apport 2.20.1-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # firmware dumps from iwlmvm iwlwifi driver
DRIVER=="iwlwifi", ACTION=="change", ENV{EVENT}=="error_dump", RUN+="/usr/share/apport/iwlwifi_error_dump $env{DEVPATH}"
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