What follows is an opinion from the Supreme Court of the United States. Your task is to determine the issue of the Court's decision. Determine the issue of the case on the basis of the Court's own statements as to what the case is about. Focus on the subject matter of the controversy rather than its legal basis.

December 12, 1955.
No. 111.
Gonzales v. Landon, District Director, Immigration and Naturalization Service, et al.
A. L. Wirin argued the cause for petitioner. With him on the brief was Fred Okrand. Oscar H. Davis argued the cause for respondents. With him on the brief were Solicitor General Sobeloff, Assistant Attorney General Olney, Beatrice Rosenberg and J. F. Bishop. Briefs of amici curiae were filed by John W. Willis for Mendoza-Martinez, and by Osmond K. Fraenkel and Loren Miller for the American Civil Liberties Union.
Cer-tiorari, 349 U. S. 943, to the United States Court of Appeals for the Ninth Circuit. Argued December 7-8, 1955. Decided December 12, 1955.
Per Curiam:
The Court is of the view that the standard of proof required in denaturalization cases (see Schneiderman v. United States, 320 U. S. 118; Baumgartner v. United States, 322 U. S. 665) is applicable to expatriation cases arising under § 401 (j) of the Nationality Act of 1940, 54 Stat. 1137, as amended, and has not been satisfied in this case. Accordingly the judgment below is reversed without reaching the constitutional questions that have been presented.

Question: What is the issue of the decision?
01. voting
02. Voting Rights Act of 1965, plus amendments
03. ballot access (of candidates and political parties)
04. desegregation (other than as pertains to school desegregation, employment discrimination, and affirmative action)
05. desegregation, schools
06. employment discrimination: on basis of race, age, religion, illegitimacy, national origin, or working conditions.
07. affirmative action
08. slavery or indenture
09. sit-in demonstrations (protests against racial discrimination in places of public accommodation)
10. reapportionment: other than plans governed by the Voting Rights Act
11. debtors' rights
12. deportation (cf. immigration and naturalization)
13. employability of aliens (cf. immigration and naturalization)
14. sex discrimination (excluding sex discrimination in employment)
15. sex discrimination in employment (cf. sex discrimination)
16. Indians (other than pertains to state jurisdiction over)
17. Indians, state jurisdiction over
18. juveniles (cf. rights of illegitimates)
19. poverty law, constitutional
20. poverty law, statutory: welfare benefits, typically under some Social Security Act provision.
21. illegitimates, rights of (cf. juveniles): typically inheritance and survivor's benefits, and paternity suits
22. handicapped, rights of: under Rehabilitation, Americans with Disabilities Act, and related statutes
23. residency requirements: durational, plus discrimination against nonresidents
24. military: draftee, or person subject to induction
25. military: active duty
26. military: veteran
27. immigration and naturalization: permanent residence
28. immigration and naturalization: citizenship
29. immigration and naturalization: loss of citizenship, denaturalization
30. immigration and naturalization: access to public education
31. immigration and naturalization: welfare benefits
32. immigration and naturalization: miscellaneous
33. indigents: appointment of counsel (cf. right to counsel)
34. indigents: inadequate representation by counsel (cf. right to counsel)
35. indigents: payment of fine
36. indigents: costs or filing fees
37. indigents: U.S. Supreme Court docketing fee
38. indigents: transcript
39. indigents: assistance of psychiatrist
40. indigents: miscellaneous
41. liability, civil rights acts (cf. liability, governmental and liability, nongovernmental; cruel and unusual punishment, non-death penalty)
42. miscellaneous civil rights (cf. comity: civil rights)
Answer: