What is the meaning of the following traffic sign?

1. Entry is permitted for all commercial motor vehicles that have an all up weight which exceeds the weight indicated in the sign.
2. Correct answer: No entry for any vehicle that has an all up weight which exceeds the weight indicated in the sign.
3. No entry only for commercial motor vehicles that have an all up weight which exceeds the weight indicated in the sign.
4. No entry only for public vehicles that have a lesser all up weight than what is indicated in the sign.

WhyThe sign with tons and no truck applies to all vehicles: those heavier than the all-up weight shown may not enter.