The condition attached to the appropriation

The State Department and the Department of Health and Human Services opened up to Gavi the $600m appropriation Congress had set aside for vaccines, while barring the World Health Organization from receiving American money through the alliance. Secretary of State Marco Rubio and Health Secretary Robert Kennedy Jr. announced it together, and continued support was made conditional on Gavi working towards replacing mercury-containing vaccines with mercury-free alternatives.[1]

What binds here is the eligibility test attached to the sum. Releasing an appropriation is a one-off act; an eligibility test applies again every time money moves, and it determines whom the receiving institution may fund. A plainer explanation is also available: the decision may be the technical resolution of a two-year budget blockage and a requirement of local politics over vaccine content.[1]

The party that has to change its conduct

The party obliged to satisfy the condition is Gavi. The World Health Organization loses an indirect funding channel without any decision of its own, because an intermediary institution's eligibility rules changed. The difference in scale makes the loss concrete: American funding reached more than $400m in 2019, about 15 percent of the organization's budget, and that budget runs to some $3.4bn a year.[1]

Whether the condition truly binds will show up somewhere observable: Gavi's procurement decisions. If Gavi announces a published change to its sourcing of mercury-containing vaccines by the end of the year, the condition will have altered conduct. If no such change is published, the money will have been released and the rule left unapplied.[1]

A precedent built through the intermediary

A donor keeping the body it has left outside the reach of an alliance it still funds, by way of that alliance's eligibility rules, exercises authority differently from a direct cut: the decision stays with the donor while the burden of applying it passes to the intermediary. Trump halted funding in 2020, Biden reversed it in January 2021, and Trump announced the withdrawal on 20 January 2025; this time the rule reaches where the withdrawal could not.[1]