Four members of Iran's World Cup delegation have secured successful appeals against visa denials for entry into the United States, though 11 others will be barred from travelling to America for their team's matches.
The appeals came after Washington confirmed that Iranian players would be permitted to participate in the tournament.
Of 15 delegation members originally refused visas, 10 lodged fresh applications upon arriving in Mexico.
Among the four successful applicants were a technical analyst and two officials from the federation's international department.
Iran's World Cup journey has been a story in itself
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Iranian Football Federation president Mehdi Taj remains among those denied entry, alongside a vice-president and several other key staff members.
Iran have established their World Cup headquarters in Mexico amid ongoing conflict between their nation and the United States.
The team's opening fixture sees them take on New Zealand in Los Angeles on 15 June, marking their first match of the competition.
They will make a return to Los Angeles on 21 June for their second group match against Belgium, before travelling to Seattle to complete their group stage campaign against Egypt on 26 June.
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The tournament is being jointly hosted across three nations: Canada, Mexico and the United States.
Those refused entry for a second time include two team administrators who handle daily operations, a media officer and a security officer.
A second media officer opted not to submit another application following the initial rejection.
Beyond delegation restrictions, Iranian supporters have faced their own setbacks. US officials revoked the country's group-stage ticket allocation for fans earlier this week.
FIFA has stated it is working to "maximise opportunities for Iranian supporters to attend matches" despite the restrictions.
The federation had previously submitted 10 conditions to FIFA for their World Cup participation, including permitting entry for individuals who completed military service with the Islamic Revolutionary Guard Corps.
The World Cup features an expanded format with 48 teams divided into 12 groups of four | GETTYThe visa difficulties extend beyond Iran's delegation. Somali referee Omar Artan was refused entry to the United States to officiate at the tournament.
Former FIFA president Sepp Blatter has condemned the organisation he led for 17 years over these issues. Writing on social media, the 90-year-old stated: "A Fifa World Cup host country must guarantee two fundamental principles: the safety of the country - and the unrestricted entry of all qualified teams, officials and referees."
He added: "The case of referee Omar Artan from Somalia is against one of these obligations. Fifa must never compromise the universality of football."
Supporters from certain countries have also been prevented from entering America.