; (5) carry out the adjudication of immigration and naturalization benefits applications and petitions within the Director’s statutory authority; and (6) carry out further duties prescribed by statute, or as assigned or delegated by the Secretary, which are within the statutory authority of United States Citizenship and Immigration Services. (c) Deputy director There shall be a Deputy Director of United States Citizenship and Immigration Services who shall assist the Director in carrying out the Director’s duties. (d) Office of the chief counsel There is established within United States Citizenship and Immigration Services an Office of the Chief Counsel. There shall be at the head of the Office of the Chief Counsel a Chief Counsel who shall— (1) provide specialized legal advice, opinions, determinations, draft regulations, and other assistance to the Director with respect to legal matters affecting United States Citizenship and Immigration Services; and (2) represent United States Citizenship and Immigration Services in visa petition appeal proceedings when applicable. (e) Office of policy and strategy There is established within United States Citizenship and Immigration Services an Office of Policy and Strategy. There shall be at the head of the Office of Policy and Strategy a Chief who shall— (1) develop United States Citizenship and Immigration Services policy recommendations for the Director; (2) develop strategy for policy implementation; and (3) carry out additional duties as assigned or delegated by the Director, which are within the statutory authority of United States Citizenship and Immigration Services. (f) Office of citizenship There is established within United States Citizenship and Immigration Services an Office of Citizenship. There shall be at the head of the Office of Citizenship a Chief who shall— (1) promote instruction and training on citizenship responsibilities, as well as assimilation, for eligible aliens who are interested in becoming naturalized citizens of the United States