Is the message conveyed in the following yellow traffic sign considered legal?

1. The sign is not a traffic sign; hence the message is not legal.
2. The message in the traffic sign is limited to an urban road only.
3. The yellow sign is an advertisement sign of a party having interest.
4. Correct answer: The traffic sign is legal for all matters.

WhyA yellow sign with text is a legal road sign for messages that have no dedicated sign. You must obey it.