Unfortunately, the passports from their sovereign nation, issued by Haudenosaunee, the native word for the Iroquois Confederacy, do not contain the proper radio-frequency identification chips. The passports, in fact, are just made of paper, if you can imagine that.
Read more: http://www.philly.com/inquirer/columnists/bob_ford/20100716_Bob_Ford__The_tangled_story_of_the_Iroquois_lacrosse_team.html#ixzz0u47ASqie
In a statement, the U.K. Borders Agency said: "Like all those seeking entry into the U.K., they must present a document that we recognize as valid to enable us to complete our immigration and other checks."
The British government's decision was announced hours after the U.S. cleared the team for travel on a one-time waiver at the behest of Secretary of State Hillary Rodham Clinton. U.S. authorities initially had refused to accept the passports issued by the Iroquois Confederacy, which lack new security features now required for border crossings because of post-Sept. 11 crackdowns on document fraud and illegal immigration.
...
New U.S. passports contain embedded radio-frequency identification chips, similar to the ones inside highway toll transponders. The Iroquois documents look similar to U.S. passports but are emblazoned with a Haudenosaunee insignia featuring a tree and animal emblems. The simple blue booklet is made with thinner paper than U.S. passports, has no high-tech chips and some information is handwritten.
At least four Indian nations, including the Kootenai, of Idaho; the Pasqua Yaqui, of Arizona; the Tohono O'odham Nation, of Arizona and Mexico; and the Seneca, of New York, have been working with federal officials to develop ID cards that meet new security guidelines, but would be good only for arrivals in the U.S. by land or sea, according to the Department of Homeland Security.
Frichner, who also is the North American Regional Representative to the U.N. Permanent Forum on Indigenous Issues, said the Iroquois have almost completed a transition to higher security passports. The process has cost the six-nation confederacy more than $1.5 million, she said.
http://www.9wsyr.com/news/local/story/Update-Iroquois-Nationals-Lacrosse-Team-returns/rrAG8HtNx0i4HWLs7-KWKw.cspx
The Iroquois have used their own passports in the past, but State Department spokesman P.J. Crowley said the new dispute can be traced to the Western Hemisphere Travel Initiative, which went into effect last year. The new rules require, among other things, that Americans carry passports or high-tech documents to cross the country's borders.
http://www.9wsyr.com/news/local/story/Update-Iroquois-Nationals-Lacrosse-Team-returns/rrAG8HtNx0i4HWLs7-KWKw.cspx
Sure sounds to me that the issue is the lack of "new security features", since they've been used for international travel before. I wonder how the Canadian team slipped through ..?
Maybe a match between the tournament winners and the Iroquois Nationals, on their own turf, is in order.