Tim your thought experiments are quite interesting, so please do!
Every girl should wear a chastity belt
Or don't be such a bore 
- Edited
I don't have ideas where schools require students to wear chastity equipment because "I don't enjoy writing stories centered around an authority using laws or rules to discriminate against large group of people based on something they can't control like sex or skin color".
Three of my ideas have individuals in chastity at school, but for their own reasons:
One where a spoiled brat accepted chastity willingly but is ignoring the spirit of the deal so, several years later her mother grows desperate and puts stricter rules on her to motivate her to turn her life around. (This is one of my best ideas, but I might have to give it to one of my writing buddies. It came to me as fanfiction and, every time I try to change the idea to be original, my muse finds new reasons for it to be the fanfiction I don't want to write.)
One science fiction story where everyone wears a symbiotic body suit from birth and a shy girl orders hers to put her in chastity until she works up the courage to confront her crush.
One where a girl with a chastity fetish lives in a setting where you can spontaneously get the ability to cast magic spells that reflect your personality and your desires, and then she has to deal with the consequences of impulsively putting herself in time-locked chastity when she hasn't even told anyone she has a chastity fetish to begin with.
...and then I have other ideas which don't involve school in any way.
Angelina i have watched the films, this has very little to do with what i understand by "good chastity", i would like to say that my father does not behave like this in any way
I haven't watched these,but,based on his description,it seems it is made for fetishists.
Angelina not on the nude beach
I would have to try it before giving my opinion about it! 
But I think I would try to go on a nude beach,someday,probably when free of my chastity belt.
Renita So, you only suggest it for parents of school girls.
In the real world? Only willing wearers and I'm uncomfortable with parents being involved because they have so much power over their children.
In stories, I use it as a narrative device with a lot of possible uses, but I avoid ideas where laws or rules are used to force it on large numbers of unwilling people.
I've read it. I think it would be better to start a new thread when I talk with Ines about my ideas if she wants to talk about them here, so fiction doesn't crowd out the non-fiction stuff.
Vanessa I haven't watched these,but,based on his description,it seems it is made for fetishists.
They are. The Neosteel "Exempt from Restriction" video that was mentioned before is the only one I can easily remember that does a good job and, like someone said, the way the husband behaved is not a good sign.
Vanessa it seems it is made for fetishists.
yes for spanking fetishists. the cb plays a rather small role
Vanessa probably when free of my chastity belt.
of course only as soon as I am free of the belt and only together with my (then) wife 
Tim They are. The Neosteel "Exempt from Restriction" video that was mentioned before
i also know the video and because it is in german i even understand it. but i also think that the man who marries the girl does not deserve the "gift" of a virgin
Tim The Neosteel "Exempt from Restriction" video that was mentioned before
Here? https://unwedchastity.org/d/27-chastity-belt-under-wedding-dress/26
At what age should they start wearing?
7 posts were split to Chastity belt for stepdaughter.
Angelina as soon as sexual interests are present
I think it's better to start wearing the belt before those interests are present, so that it prevents any attempts to act on them once they appear.
now you sound like my father.
he said that he had already acted too late with me
but seriously, then at 14 you are actually too late
what he says doesn't matter. but he gets drunk during the wedding and then forgets the key to the belt. he behaves absolutely disrespectful towards his wife