Number 18 of the Youth International Party Line, published May 1973. This issue is titled "the sex change issue" and relays a letter from a reader asking YIPL to stop using "Ma Bell" as Bell Telephone is a system of the patriarchy, and instead to call is "Pa Bell". Articles include a continuation of an article from the previous issue on how Bell came to dominate the telecommunications industry, how to prevent long distance calls from being made on your phone line, information on inflation, an update on credit card fraud checks, and information on the credit card numbers of the Bureau of Indian Affairs and how they are treating Indigenous peoples. There is also an article written by Abbie Hoffman on the importance of free speech.

Letters from readers include an appeal to help stop the 'Special Treatment and Rehabilitation Training' program at the U.S. Medical Centre (United States Medical Center for Federal Prisoners), information on loop lines, and using Mexican pesos instead of American coins in payphones.