SEC. 8. Section twenty of Act Numbered Five, as amended by Acts Numbered One hundred and sixty-seven, Three hundred and six, and Five hundred and eighty-nine, is hereby amended to read as follows:
"SEC. 20. The requirements of this Act for entrance into the civil service, or for promotion by examination, shall not apply to the selection of the following officers and employees:
"1. One private secretary to each member of the Philippine Commission, including the Civil Governor.
"2. Any person in. the military or naval service of the United States who may be detailed for the performance of civil duties.
"3. Persons employed as semiskilled or unskilled laborers whose rate of compensation is less than three hundred and sixty dollars per annum.
"4. All employees whose rate of compensation is one hundred and twenty dollars or less per annum.
"5. Postmasters and customs inspectors whose rates of compensation do not exceed three hundred and one hundred and eighty dollars per annum, respectively, who may lawfully perform the duties of postmaster or customs inspector in connection with the other official duties with which they are charged, if they be government employees, or if not government employees, in connection with their private business, such duties requiring only a portion of their time.
"6. Detectives, secret agents, sheriffs, and deputy sheriffs.
"7. Any position in the Department of Commerce and Police the duties of which are of a quasi military or quasi naval character.
"8. Chinese and Japanese employees."