“…players were prohibited to wear hard objects during games.”
- Required to — or prohibited from.
- Never required from — nor prohibited to.
Hey, don’t wear even a cheap Timex when you’re playing football. And no chain mail, please. Avoid steel-toed shoes. Buttons can hurt somebody. Get that Bluetooth out of your ear. And breastplates are out.
Safety first.
English Is A Complicated Language 
Hmmm aren’t helmets hard items?
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