Whether Sosna's class action became moot when she personally satisfied Iowa's one-year residency requirement and obtained a divorce elsewhere.
Holding
No. The certified class action remained a live controversy even though Sosna's individual claim had become moot.
Reasoning
At filing and at class certification, Sosna had a concrete injury: Iowa's statute prevented her from pursuing a divorce in Iowa. Once the District Court properly certified the class, the unnamed class members acquired a legal status distinct from Sosna's individual stake in the litigation.
The challenged requirement continued to bar other recently arrived Iowa residents from filing for divorce. Because no individual plaintiff would ordinarily remain subject to a one-year waiting period long enough to complete appellate review, the controversy was capable of recurring as to class members while evading review by any single challenger.
The Court relied on the rationale reflected in Dunn v. Blumstein: a representative class action may continue where the named plaintiff's personal claim has expired, provided a live controversy remains between the defendants and class members. Sosna was a member of the class and had a live claim when certification occurred, and the class's interests were adequately represented.