- The Road Runner cannot harm the Coyote except by going “meep, meep.”
- No outside force can harm the Coyote — only his own ineptitude or the failure of Acme products. Trains and trucks were the exception from time to time.
- The Coyote could stop anytime — if he were not a fanatic.
- No dialogue ever, except “meep, meep” and yowling in pain.
- The Road Runner must stay on the road — for no other reason than that he’s a roadrunner.
- All action must be confined to the natural environment of the two characters — the southwest American desert.
- All tools, weapons, or mechanical conveniences must be obtained from the Acme Corporation.
- Whenever possible, make gravity the Coyote’s greatest enemy.
- The Coyote is always more humiliated than harmed by his failures.
- The audience’s sympathy must remain with the Coyote.
- The Coyote is not allowed to catch or eat the Road Runner.