The Court of Arbitration for Sport has handed Russia a legal victory that now threatens to fracture international ice hockey. CAS ruled that the IIHF's exclusion of Russian national teams — in place since the full-scale invasion of Ukraine in February 2022 — was based on insufficiently proven security concerns. The federation must now readmit Russia to world championships, starting with the World Juniors in Canada on December 26. Newly elected IIHF president Franz Reindl, a German who took office just last month, called an emergency meeting of the federation's decision-making body for Monday and Tuesday. His language was careful — 'implement this ruling responsibly' — but the subtext is stark: several championships are weeks away, and the practical logistics of inserting a previously banned national program into finalized tournament brackets are enormous. Canada's response was immediate and hostile. Foreign Affairs Minister Anita Anand called the decision 'very unwelcome' and said 'all options are on the table.' More concretely, Secretary of State for Sport Adam van Koeverden appeared to rule out visas for Russian athletes, stating Canada would 'maintain restrictions on the participation of Russian athletes at events hosted in Canada.' This sets up a direct collision between CAS jurisdiction and Canadian sovereign immigration authority. Germany faces a parallel dilemma with the 2027 Men's World Championship scheduled for Gelsenkirchen, Düsseldorf, and Mannheim. The German government said it takes 'a very critical view' of the CAS ruling and will discuss 'possible consequences.' DEB chief executive Frank Lutz acknowledged the nuclear option on MagentaSport: surrendering hosting rights entirely. For a lucrative tournament already deep in planning, that would be an extraordinary financial and organizational loss. The broader diplomatic picture is messy. Latvia is legally prohibited from competing against Russian teams. Finland said individual players could opt out. Sweden's federation chairman Anders Larsson, himself an IIHF Council member, simultaneously said 'a boycott is not on the table' and that 'Russia cannot participate in international championships in the current situation' — a contradiction that captures the institutional paralysis precisely. Ukraine, Czechia, and Finland's federations have all expressed disappointment. Moscow is treating this as vindication. Sports Minister Mikhail Degtyarev declared on state television that 'discrimination in hockey has been brought to an end.' The Kremlin's framing is deliberate: each CAS victory becomes precedent for the next sport. Russian Football Association general secretary Maxim Mitrofanov told Tass there 'should be one rule for all,' while FIFA already allowed a Russian boys' team to compete under its national flag at the inaugural Under-15 World Cup in Azerbaijan last week. The structural question is whether CAS rulings can override sovereign visa decisions and national laws. If Canada refuses entry to Russian athletes, the legal and institutional standoff between sports arbitration and state power becomes the real story — far bigger than any hockey tournament.