ksjack,
Prior to 1910, I can't find any laws regarding prostitution. Can you please support your claim: "There were MANY municipalities that outlawed prostitution before 1910."
I was using the example of the Bureau of Indian Affairs and the "anti-prostitution pledge" as examples that the Federal government does deem prostitution illegal. I wasn't aware that I was claiming that the "anti-prostitution pledge" was a law.
There are a few federal laws regarding prostitution: http://prostitution.procon.org/view....ourceID=000119