Final answer:
In an examination or investigation, the Commissioner is authorized to require the opinion of the principal officers in executive departments and perform various administrative duties.
Step-by-step explanation:
In an examination or investigation, the Commissioner is authorized to require the opinion of the principal officers in executive departments, in writing, on subjects related to the duties of their offices. The Commissioner of the General Land Office, who also serves as the chairman of boards controlling the exploration for oil, gas, and minerals on state lands, has authority in this regard. The Commissioner is also responsible for giving information to Congress about the state of the union, recommending measures, convening both Houses, receiving ambassadors, ensuring the execution of laws, and commissioning all the Officers of the United States.