SEC. 6. _And be it further enacted_, That nothing herein contained shall be construed to require the re-appointment of persons now in office until the expiration of their present term of service; but the commissions of all Indian agents and sub-agents now in office shall expire on the fourth day of March next, unless sooner terminated. SEC. 7. _And be it further enacted_, That the limits of each agency and sub-agency shall be established by the Secretary of War, either by tribes or by geographical boundaries. And it shall be the general duty of Indian agents and sub-agents to manage and superintend the intercourse with the Indians within their respective agencies, agreeably to law; to obey all legal instructions given to them by the Secretary of War, the Commissioner of Indian Affairs, or the Superintendent of Indian Affairs; and to carry into effect such regulations as may be prescribed by the President. SEC. 8. _And be it further enacted_, That the President of the United States may, from time to time, require additional security, and in larger amounts, from all persons charged or trusted, under the laws of the United States, with the disbursement or application of money, goods, or effects of any kind, on account of the Indian Department. SEC. 9. _And be it further enacted_, That an interpreter shall be allowed to each agency, who shall receive an annual salary of three hundred dollars: _Provided_, That where there are different tribes in the same agency speaking different languages, one interpreter may be allowed, at the discretion of the Secretary of War, for each of the said tribes. Interpreters shall be nominated, by the proper agents, to the War Department for approval, and may be suspended, by the agent, from pay and duty, and the circumstances reported to the War Department for final action; and blacksmiths shall in like manner be employed wherever required by treaty stipulations; and such blacksmiths shall receive an annual compensation of four hundred and eighty dollars; and if they furnish their shop and tools, an additional sum of one hundred and twenty dollars; and their assistants shall be allowed an annual compensation of two hundred and forty dollars. And wherever farmers, mechanics, or teachers are required by treaty stipulations to be provided, they shall be employed under the direction of the War Department, and shall receive an annual compensation of not less than four hundred and eighty dollars, nor more than six hundred dollars. And in all cases of the appointments of interpreters or other persons employed for the benefit of the Indians, a preference shall be given to persons of Indian descent, if such can be found, who are properly qualified for the execution of the duties. And where any of the tribes are, in the opinion of the Secretary of War, competent to direct the employment of their blacksmiths, mechanics, teachers, farmers, or other persons engaged for them, the direction of such persons may be given to