Update: new information from Tom Armstrong - click through.

Kentucky Representative David Osbourne has introduced a bill that would prohibit the transportation of people under the age of 18 in a bicycle trailer or "other apparatus."
The text of the bill is quite short and doesn't provide much specific information. However, what details are available can be found on the Kentucky Legislative Research Commission's website. No one seems to know what prompted this bill's creation or what the likelihood is that it might pass and become law.
As more infomation becomes available, I will share it with cartky.org readers.