I think the boy in the permit department was handing you a line. If they didnt give you a set of rules, laws, or guidelines when you got the permit, then Id go down to the permit department and ask to see the "rules" in writing. Dont take anyone word for it. If they wont give it to you in writing, its BS.
"If the rule you followed brought you to this,
of what use was the rule?"
“The enemy is anybody who's going to get you killed, no matter which side he is on.” - Joseph Heller