the legislation that was passed by the chickens to ban tacos in the year 9595

A piece of legislation whose title either intentionally or otherwise:-

1) Has little or nothing to do with how it will operate in practice. It may even be completely ineffective.
2) In practice does the exact opposite to the title.

Could also be described as a dud, con, fraud or even surreal.

The term refers to a famous Monty Python sketch about a dead parrot.

Any type of bill, resolution, statute, etc., that bans or otherwise prohibits the sale or consumption of tacos, and any meals made of tacos.

What judges do when they hand down a decision you don't like.

laws against robot, e.g. ticket bot, impersonation bots, "small" donation bots, voting bots, donor bots
From Professor Tim Wu, the author of “The Attention Merchants: The Epic Struggle to Get Inside Our Heads,” is a professor at Columbia Law School and a contributing opinion writer to New York Times

A currently non existant, but very much needed, us piece of federal legislation that would theoretically prevent any US state or state legislature from passing any "asinine" (morally stupid and useless) legislation.

The thirty first rule of inflation. Typically found while pondering orbs.