The Florida House passed a bill on April 14, 2021, that would ban trans girls and women from playing on high school and collegiate teams. It would also allow schools to require a genital inspection of student athletes suspected of being trans.
CS/HB 1475 - Sex-specific Student Athletic Teams or Sports, which is now before the Florida State Senate, does neither of these things. Full text of the current version is available here and the full legislative history including amendments adopted and voted down in the House is here. And - sorry, not sure if this is accessible outside the US - more detail on the House discussions is here. I don't see the Representative that allegedly endorses this "genital inspections!" moral panic showing up.
The proposed legislation doesn’t mention genital inspections; the only possibly relevant text is (lines 59-66): "The health care provider may verify the student's biological sex as part of a routine sports physical examination by relying only on one or more of the following: The student's reproductive anatomy; The student's genetic makeup; or The student's normal endogenously produced testosterone levels."
In real life, an annual physical for teenagers attending a US public school (and certainly for most involved in competitive sport) includes lying down on a table in your underpants only and a semi-transparent “johnny”. I apologise for the crudity, but this thread has a lot of delusion in it: in the vast majority of cases, no one has to touch or even bare your genitals to know what’s up. And that’s for kids who show up from abroad; US public school children will have a medical record which follows them (as long as they stay in the US) since they first started school, as they’d be obliged to show, at the very least, a vaccination history. The idea that a child’s paediatrician doesn’t know the child’s sex is disingenuous.
The bill would also allow the school or another party to “dispute” a student’s gender, which would then require the student to provide proof of biological sex from a health care provider through either a physical exam, a genetic test, or proof of testosterone levels.”
This is exactly (apart from the conflation of gender and sex) what the bill seeks to PREVENT, by empowering the school to obtain and record this information up front - which they would do, as (if the bill passes) the school would then become the legally responsible party rather than any regional, state, or national bodies.
Many sports are mixed sex and women still (s)trive and win. Sure, and the bill explicitly acknowledges this, categorising competitive categories as all male, all female, or co-ed. The co-ed category is exempt from any of this.
Yet in primary schools in the UK you tend to change infront of others and play PE games with members of the opposite sex. True in the US too (except there normally would be separate locker rooms) - but this legislation specifically applies to secondary (12+) and tertiary (18+) education.
RE birth certificates, each US state issues its own and laws vary widely about what sexes can be recorded and how and when they can be changed. In California, for example, it is possible to have a birth certificate issued with sex of M, F, X, or blank, with the opportunity (but not the requirement) to amend later on. This was designed to address certain specific intersex conditions, but is not limited to such cases. Therefore, in some cases there is no legal record of sex.