Rule on wearing masks should be made clear

I REFER to the letter “A rule is a rule, it should apply to all” (The Star, Sept 22; online at https://bit.ly/2Hqs1QL). The writer’s understanding is that wearing a mask means it must cover both the nose and mouth as “That is where breathing takes place.”

The writer is therefore disappointed that on public transport as well as in crowded places, one “will see people leaving their noses uncovered.” Perhaps these people have a different understanding of wearing a mask! And that’s what can happen when the law is not clear.