Near Gulpen a military colonne is approaching from the left. The first vehicle (blue flag) has not yet reached the junction where you want to cross. What applies?
The colonne has priority regardless, no matter the ordinary rules
I may not cross at all, because a colonne is approaching
The ordinary priority rules of this junction determine who goes first
Explanation
False — trap: prohibition applied without its two conditions. Before the first vehicle has passed, the ordinary rules simply apply — there is nothing to cut through yet (Book p.114).