There is much to say about how the Final Girl changed in 1990s horror, so this post will inevitably be partial.
First of all, the Final Girl became intriguingly fused with AUTHORITY in the 1990s. In the slasher films of the 1980s, the authority figures were, for the most part, nowhere to be found when the killer started stalking and slaughtering teens. In fact, part of the ideological message of these films was to indict the authority figures (parents, police, doctors) who were either recklessly absent, incompetent, or were somehow involved in creating the problem in the first place. Why did officials at the psychiatric hospital allow Michael Myers to escape, anyway? Why are police and/or parents signally absent when it matters in Halloween (1978), Friday the 13th (1980), and their many sequels?
Things changed with the groundbreaking The Silence of the Lambs (Jonathan Demme, 1991). Clarice Starling (Jodie Foster) is unambiguously a Final Girl, meeting all the characteristics, as I laid them out in Part 1 of this series. As fledging FBI agent, however, she is also the authority figure—and an effective one at that. She finds Buffalo Bill (Ted Levine) and saves his latest victim while the rest of the FBI is miles away.