It astounds me that we have survived so long and so well without an "original parts only" law as to public restroom use."  I do not wish to be astounded by who will be the parts inspectors. 

More to the point, it seems to me that there will be less confusion amongst those proverbially confused little children, and much less fright amongst those proverbially easily scared horses, if we stick to a few simple rules that have largely served us well since, well, forever. One, use restrooms consistent with the parts you got, rather than the ones you had or wished you had. Two, don't confuse dumping stations with inspection stations.

Now, having become intrigued with this birth certificate issue, I'm going ask my vet if my dog, who happens to have a birth certificate listing him unsurprisingly as a dog, can have kittens if we just change his birth certificate to say "cat." Surely, the form must control practical reality.