Can a Coach use Signs on sideline?

[Ed Hickland]

Originally posted by JimNayzium
just a lazy quextion becuase i don't feel like looking it up..

I am a coach, can I use poster board signs with words on them to hold up on the sideline to signal plays in?

Coach,

Rule 1-5-3b prevents electronic or mechanical devices for communications. Therefore, the answer is no.

I must ask the obvious. If you could use a poster board wouldn't that make it possible for the other side in the game and scouts from future games to steal your plays?