Officers of the Foreign Service shall protect the rights and interests of the United States in its international agricultural, commercial, and financial relations. In pursuance of this duty, they shall:
(a) Guard against the infringement of rights of American citizens in matters relating to commerce and navigation which are based on custom, international law, or treaty.
(b) Observe, report on, and, whenever possible, endeavor to remove discriminations against American agricultural, commercial, and industrial interests in other countries.
(c) Protect the national commercial reputation of the United States.