salary incident to the  period of his service as Director or Assistant Director. [2468-12, 17, 21.] S ECTION  773 . Qualifications for Appointment as Commissioned Officer. — To be eligible for appointment as commissioned officer of the Philippine Health Service, a person must be a citizen of the Philippine Islands or of the United States and a physician of  good repute and character, legally entitled to practice medicine and surgery in the Philippine Islands. [2468-18.] S ECTION  774 . Salaries of Commissioned Officers. —  Commissioned officers of the Philippine Health Service shall receive salaries per annum as follows: Senior medical inspector or medical inspector, being chief of division, six thousand pesos; senior medical inspector, four thousand pesos; medical inspector, three thousand pesos; senior surgeon, two thousand pesos; surgeon, one thousand six hundred pesos.  The position of chief of division shall not be permanently held by any officer below the grade of medical inspector. [2468-17.] S ECTION  775 . Additional Pay. — Commissioned officers of the Philippine Health Service shall be entitled to receive additional pay at the rate of ten per centum for each five years of service; but a chief of division shall not receive more than eight thousa nd pesos, nor a senior medical inspector more than five thousand five hundred pesos, and other officers shall not receive such additional pay in an amount exceeding forty per centum of the pay of their respective grades. In case of any future promotion, the years of service for the purposes of this paragraph shall be computed from the date of such promotion and not from the date of entrance into the service. Medical officers assigned to duty at the leper colony, Culion, shall be entitled to receive an additional ten per centum on their pay proper while so serving.  [2468-17; 2540-1 (Phil. Health Service.] SECTION  776 . Additional Pay Based Upon Linguistic Attainments. — Any commissioned officer of the Philippine Health Service who may demonstrate Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 237