Absence from the United States of more than six months but less than one year during the period for which continuous residence is required for admission to citizenship, immediately preceding the date of filing the application for naturalization, or during the period between the date of filing the application and the date of any hearing under section
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(a) of this title, shall break the continuity of such residence, unless the applicant shall establish to the satisfaction of the Attorney General that he did not in fact abandon his residence in the United States during such period.
Absence from the United States for a continuous period of one year or more during the period for which continuous residence is required for admission to citizenship (whether preceding or subsequent to the filing of the application for naturalization) shall break the continuity of such residence, except that in the case of a person who has been physically present and residing in the United States, after being lawfully admitted for permanent residence, for an uninterrupted period of at least one year, and who thereafter is employed by or under contract with the Government of the United States or an American institution of research recognized as such by the Attorney General, or is employed by an American firm or corporation engaged in whole or in part in the development of foreign trade and commerce of the United States, or a subsidiary thereof more than 50 per centum of whose stock is owned by an American firm or corporation, or is employed by a public international organization of which the United States is a member by treaty or statute and by which the alien was not employed until after being lawfully admitted for permanent residence, no period of absence from the United States shall break the continuity of residence if—
The spouse and dependent unmarried sons and daughters who are members of the household of a person who qualifies for the benefits of this subsection shall also be entitled to such benefits during the period for which they were residing abroad as dependent members of the household of the person.