When a reference to MFA is not a source anymore, that tells a lot about your knowledge.
I would like to see you make this same kind of remarks when at entry an IO asks you something, but I think you will not be that stubborn anymore and just accept what the IO tells you.
Why should it need additional proof that a requirement on day 1 still is valid on day 365 and on day 1826?
The purpose of the DTV is clearly described on the page where you apply, and nowhere is mentioned that this changes during validity.
Only some jokers here keep telling that this is not true, but when you ask them where it says that requirements stop at a certain moment, they cannot answer.
They cannot even tell at which day requirements stop.
I not compare two types visa with each other, I just give general rules about ALL visa, you're the one that wants to distinguish between visa and want to see difference, I only tell what is common for ALL visa.
just ask MFA and they will tell you the same, I don't compare tourist with non-o, I just explain some basic visa rules, you simply don't understand, and it is a waste of time to explain to you, but this group will have more intelligent user who will understand, so in total it is not a waste of time.