It is dusk on the weekly-market car park and the lamps flick on. On your trailer you mount a square marker board of 45 by 45 cm. Someone says it is too small. Does 45 x 45 cm comply with the law?
Yes — 45 cm is above the legal minimum of 0.42 x 0.42 m
No — a marker board must legally be at least 50 x 50 cm
Explanation
Wrong — trap: shop size taken as law. **Legal min. = square 0.42 x 0.42 m**; 50x50 is only a commercial size, so 45x45 complies.