Never, ever take someone's word when your life hangs in the balance.
In this case the only thing I would say to the BLM over the phone is, "can I come over and talk to you in person?" Then I would be prompt and prepared with my questions, tape record the conversation(because memory is not the gospel), and write my understanding of the conversation in an email for an exact clarification from the official person in question in writing. Of course, making sure he/she is the official authority on the matter do not proceed until you receive a letter back confirming exactly as you understood.
Oral conversations are worthless except for a temporary piece of mind. When the cloud of understanding blows by, don't be caught in your birthday suit
Unless you just bought a hot springs in Colorado
Then broke and warm aint so bad