I got a sign says "Keep door closed at all times"
some one said the grammar is wrong in it. says there should be "the" in that sentence.
I tried searching abit I found out that this is similar to "stick no bills"
So I guess in request forms the grammar doesn't matters. In signs or boards how do I explain this, like is there a rule in english for these type of things?
The same applies to, for instance:
Keep Clear - Access Required
If this were a full sentence, it would say "Keep this area/space clear because access is required [at all times]" That would be a very big sign!