In practice, this means:
Instead of requesting files, the community expects members to: what is the title of forum rule 6 cs rin
You cannot complete registration without typing the exact title (or a close enough match) into a text box. This forces prospective members to actually read the rules page rather than blindly clicking "I agree." What Is the Title of Forum Rule 6 on CS
Why do people call it "Rule 6"? It is likely a psychological remnant of early internet forum culture (early 2000s vBulletin/phpBB days), where most boards had a standard sticky: Rule #6: Search before posting. this means: Instead of requesting files