The given statement is true.
Explanation:
Its not a general duty or not fall under any act to inform the buyers about the slippery condition of the shop's floor. If someone enters into the shop during cleaning and moping he or she may fall down and get injure. For this he has no right to lodge a complaint against shopkeeper.
If a shopkeeper hang a board on the door of the shop like careful cleaning work is going on. That just because of his basic civic sense, nothing else. He is not bound to inform about it to anybody. If he do it's just for the convenience of public.
The Executive Department does not call its chief administrator the secretary of the department. This is because the chief administrator of the Executive Department of the Government is the President or the leader of the country. Other people who are in the different branches of the government are appointed by the President because they are a part of his cabinet.