[ANSTHRLD] OT but still heraldry

[HL Chiara Francesca]

The school district that I work for is wanting me to create a new piece of 
art for the portal. I said we could use the school coat of arms. Silence.

The school does not have a coat of arms. NOW they want me to create one for 
them.

So my question to you is this.

Where can I find references to school heraldic rules if there are any. I.E. 
is there a set of rules for setting up an academic heraldic layout like 
there is for a crown or for a female or for a academic institusion, etc.

Chiara