prestarle toda la ayuda y protección lícitas. The term "citizen/national" and its equivalent terms ("citoyen ou ressortissant"; "ciudadano o nacional") are used in the message as some people born in American Samoa, including Swains Island, are nationals but not citizens of the United States. The masculine inflections of "Le Secrétaire d'État" and "El Secretario de Estado" are used in all passports, regardless of the sex of the Secretary of State at the time of issue. Sex offenders In November 2017, pursuant to the International Megan's Law, the Department of State announced that passports of US citizens previously convicted of sex crimes against minors would be endorsed with the message, "The bearer was convicted of a sex offense against a minor, and is a covered sex offender pursuant to [U.S. law]." Languages At a League of Nations conference in 1920 about passports and through-train travel, a recommendation was that passports be written in French (historically, the language of diplomacy) and one other language. English, the de facto national language of the United States, has always been used in U.S. passports. At some point after 1920, English and French were used in passports. Spanish was added during the second term of the Clinton administration. The field names on the data page, the passport message, the warning on the second page that the bearer is responsible for obtaining visas, and the designations of the amendments-and-endorsements pages, are printed in English, French, and Spanish. Biometric versions The legal driving force behind biometric passports is the Enhanced Border Security and Visa Entry Reform Act of 2002, which states that smart-card identity cards may be used in lieu of visas. That law also provides that foreigners who travel to the U.S., and want to enter the U.S. visa-free under the Visa Waiver Program, must bear machine-readable passports that comply with international standards. If a foreign passport was issued on or after October 26, 2006, that passport must be a biometric passport. The electronic chip in the back cover of a U.S. passport stores an image of the photograph of the passport holder, passport data, and personal data of the passport holder; and has capacity to store additional data. The capacity of the radio-frequency identification (RFID) chip is 64 kilobytes, which is large enough to store additional biometric identifiers in the future, such as fingerprints and iris scans. Data within the chip is signed with an RSA-2048