10/28/1940
https://www.presidency.ucsb.edu...
"Upon the receipt of a request therefor from a collector of customs or appraising officer of the Government of the United States, a consular officer shall procure and forward samples of merchandise bei..."
"Before certifying invoices signed by an agent, a consular officer may, if he deems it necessary, require that a power of attorney authorizing the agent to sign invoices be executed by the principal in..."
"Consular officers shall render all proper assistance to Customs and Tariff Commission representatives abroad to aid them in the performance of their official duties."
"Consular officers of the United States shall familiarize themselves with the provisions of laws and regulations of the United States relating to the documentation of merchandise for importation into t..."