22 U.S. Code § 290c - Withdrawal from Organization on one-year notice
In adopting this subchapter the Congress does so with the understanding that, in the absence of any provision in the World Health Organization Constitution for withdrawal from the Organization, the United States reserves its right to withdraw from the Organization on a one-year notice: Provided, however, That the financial obligations of the United States to the Organization shall be met in full for the Organization’s current fiscal year.
Source(June 14, 1948, ch. 469, § 4,62 Stat. 442.)