to administer to or take from any person an oath, affirmation, affidavit, or deposition, and to perform any notarial act which any notary public is required or authorized by law to perform within the United States;

To 1 act as provisional conservator of the personal estates of deceased United States citizens; and

to assist and protect the interests of United States persons by performing other acts such as are authorized to be performed outside the United States for consular purposes by such laws of the United States as the President may specify.