I have a question: Is there a specific section(s) In the publication, "U.S. War Revenue Act of 1917" pertaining to domestic and international mails? Are there any specific references to Postal Bulletins (PB######) within the Sections??
Section two Cancellation of stamps,Section 3 Postal Rates Letters and postcards,Section 22 C.O.D. shipments, Section 36 Stamp tax in connections with Transportation. In section 33 the high penalty of One thousand dollars, What an increase from the first penalty of Fifty dollars.