Section 6
SEC. 6. Said corporation may make use of the services c of the provincial fiscal, in his capacity as attorney, of the engineer, of the district auditor, or of the provincial treasurer, for the performance of private work of the corporation, and the designation or appointment of said officers shall be subject to approval, or to revocation at any time, by the proper department head. Aside from the additional compensation for the officer appointed in accordance with the provisions of this section agreed upon between the parties, which compensation such officer may receive, any provision of existing law to the contrary notwithstanding, said corporation shall refund to the Bureau or office concerned such reasonable amount for the services rendered as may be determined by the Insular Auditor, whose decision in the premises shall be binding upon all parties.