Article 34.3 of Fifa’s Disciplinary Code prohibits the display of any political messages or slogans by players before, during or after a match

ATLANTA, July 15 : Argentina players held up a political banner declaring "Las Malvinas Son Argentinas" ("The Falklands are Argentine") after their 2-1 World Cup semi-final…

If the banner is deemed to be political in nature, it would contravene both FIFA and IFAB rules.