2.) they would have to be LEGALLY considered a female until then they are a male. This has nothing to do with the law about discrimination.
Now having said that if they are diagnosed with gender identity issues then they can be discriminated against because of that
3.) again this has nothing to do with the law
nothing wrong with different standards as long as the job can be completed IMO, now if it effects job performance then i agree 100%
4.) same as 3
but again you would have to look that stuff up yourself