I can't find a source, but I thought I read somewhere that these policies came following the Asiana Flight 214 crash [1], during which a plane did a visual appr

I can't find a source, but I thought I read somewhere that these policies came following the Asiana Flight 214 crash [1], during which a plane did a visual approach to SFO instead of ILS. My understanding was that there was a rule change requiring ILS approaches at night at SFO, then the airlines implemented policies duplicating the rules in their policies, but then the rules were revoked - still leaving airline policies in place. Anybody have any sources on this? [1] https://en.wikipedia.org/wiki/Asiana_Airlines_Flight_214 https://en.wikipedia.org/wiki/Asiana_Airlines_Flight_214