It is really not an easy thing to find info about KYC or any restricted persons in the White paper of united traders.
You need to wait for the official answer. Asked in the telegram bot but no answer...
Got an answer from the support team about the participation of US citizens in ICO:
Citizens or residents of any geographical area where access to or use of cryptocurrencies or digital tokens is prohibited by applicable laws, orders, rules, regulations, agreements or administrative acts shall not be allowed to purchase and use UTT tokens.
This is the case as well when any purchaser or user is a U.S. citizen or resident (including but not limited to, for the purpose of applicable tax laws and regulations), holds either a green card or a U.S. residence permit and is in the United States of America or his or her principal or predominant place of residence is in the foregoing territory.