APPENDIX B of the postal savings bank division, who shall receive a salary of six thousand pesos a year and perform his duties subject to the direction of the Director of Posts. (6) The chief of the postal savings bank di vision shall be required to keep a separate set of books dealing solely with the operations of the Postal Savings Bank, and to make a monthly statement of the same to the Director of Posts and to the Secretary of Commerce and Police, and at the end of eac hfiscal year an annual re port covering in detail the operations of the postal savings bank division. (c) The chief of the postal savings bank di vision shall, before entering upon the duties of his office, execute a bond to the Insular Govern ment in a sum to be fixed by the Insular Audi tor, with sufficient surety or sureties, to be ap proved by and filed with the Insular Auditor. The Insular Auditor may, from time to time, require that the bond shall be increased or de creased according as the exigencies of the ser vice require. Sec. 3. (a) Any person six years of age or over residing in the Philippine Islands, and not under legal disability, may open an account to his own credit in the Philippine Postal Savings Bank. (6) Any person resident in the Philippine Islands, twenty-three years of age or over, and any person under twenty-three years of age who is the head of a family, may open an ac count for, or make deposits to the credit of the account of, any minor, or any person who, by reason of physical or mental disability, is unable to manage his own affairs. (c) Any charitable or benevolent society in the Philippine Islands may, with the approval, previously obtained in writing, of the Director