Do females have to cover up in Morocco?

I saw this question somewhere (is covering the head with a scarf compulsory in Morocco?), so I decided to ask it here and see what you guys think. The majority of Moroccans consider themselves as Sunni Muslims. Women in Morocco are not required to cover their heads. On the street you see most women dressed quite modestly, usually the older ones wear a scarf or some other kind of fashionable headscarf. Female tourists visiting Morocco do not have to cover their heads or put their hair out, no one will force them. But it is recommended to bring a scarf if you plan to visit a religious building.