9G & BOAC
You are absolutely right, the question was about arrival fuel.
What I neglected to point out was having departed without alternate fuel you are unlikely to arrive to find that you have it thereby reinforcing that you don't need to arrive with alternate fuel. (Note the use of the word unlikely, as if there is a nearby alternate the extra 15 mins holding fuel plus any contingency remaining along with fuel saved by direct routings or more favourable winds you might just have enough for an alternate.)
However you are totally correct that the minimum fuel state for landing at destination is 30 minutes of fuel.