Is it obligatory to obey a portable traffic sign held by a member of the road safety guards?

1. Correct answer: Yes, it is a legitimate road sign.
2. No, because it was not authorized by the Road Safety Authority.
3. No, because its smaller in size than normal traffic signs
4. No, it is not a legitimate road sign, but merely a recommendation.

WhyA hand-held sign held by a school road safety guard is a legitimate road sign. All drivers must obey it.