What happened: Red Bull-Ford has formally challenged the FIA's initial ADUO ruling covering the races through the Canadian Grand Prix. The FIA informed all manufacturers of the results in Monaco, but a public announcement remains pending because Red Bull is dissatisfied with the outcome. The team argues that no data sample shows it sitting behind Mercedes on engine performance.

Why it matters: The Additional Development and Upgrade Opportunities framework determines which manufacturers earn extra engine upgrade tokens, so the ranking directly shapes the competitive order for the rest of the season. Red Bull, which earlier asked the FIA to re-examine the parity-token results, says it has seen no evidence placing it second to Mercedes. The dispute keeps the parity process unresolved and contested in the paddock.

What to watch: Watch for the FIA's pending public announcement of the ADUO results and whether Red Bull's challenge forces a revision of the manufacturer ranking.