This file is indexed.

/usr/share/polkit-1/rules.d/org.freedesktop.packagekit.rules is in packagekit 0.8.17-4ubuntu6~gcc5.4ubuntu1.

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

The actual contents of the file can be viewed below.

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polkit.addRule(function(action, subject) {
    if ((action.id == "org.freedesktop.packagekit.upgrade-system" ||
         action.id == "org.freedesktop.packagekit.trigger-offline-update") &&
        subject.active == true && subject.local == true &&
        subject.isInGroup("sudo")) {
            return polkit.Result.YES;
    }
});