Every consular officer of the United States is required, whenever
application is made to him therefor, within the limits of his
consulate, to administer to or take from any person any oath,
affirmation, affidavit, or deposition, and to perform any other
notarial act which any notary public is required or authorized by
law to do within the United States; and for every such notarial act
performed he shall charge in each instance the appropriate fee
prescribed by the President under section 4219 of this title.