8 CFR § 313.2 - Prohibitions.
Except as provided in § 313.3, no applicant for naturalization shall be naturalized as a citizen of the United States if, within ten years immediately preceding the filing of an application for naturalization or after such filing but before taking the oath of citizenship, such applicant:
(c) Is or has been a member of or affiliated with an organization that advocates communism or the establishment in the United States of a totalitarian dictatorship, either through its own utterance or through any written or printed matter published by such organization; or
(f) Knowingly circulates or has circulated, or knowingly possesses or has possessed for the purpose of circulating, subversive written or printed matter, or written or printed matter advocating communism; or
(g) Is or has been a member of, or affiliated with, any organization that publishes or circulates, or that possesses for the purpose of publishing or circulating, any subversive written or printed matter, or any written or printed matter advocating communism.