Betrayal - minimum map tier?

I never got this one straight: is there a minimum map tier, than needs to be played at, for certain Vailed Mods to drop?

Thanks!

Yes-ish.

Higher lvl unveils give more experience and there are minimum ilvls to get tier 2 and 3 vieled mods (ilvl 72 for t2 and ilvl 81 for t3)

Not sure if any mods don't show up sub 72/81 but you could check the list yourself:

https://pathofexile.gamepedia.com/List_of_veiled_modifiers

This also means when selling unveiled items that a lvl 72 Eleron's veil is worth the same as a lvl 80, but 81+ is worth more

Thank you Gravedancer. Seems that 81 is the number. I am asking because Syndicate members become quite deadly in T15-16 and I wanted to find out if I am missing something.

Don't forget that rare/unique mobs drop items at +2 ilvl. So lvl 79/T12 is the minimum to get ilvl 81 from Syndicate members.