Out of State Referral Question for Agents/Brokers

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Hi - I'm a relatively new Broker and have a question that might be dumb, but that's what these forums are for. I have a listing agreement with a customer who owns farmland in the state I am licensed. He also owns farmland in another state. There is an opportunity to sell part of the farmland in the state I am not licensed in. I have a good relationship with a broker in the receiving state and we are going to be signing a NAR Referral Contract form.

My questions are: 

1.) It's my understanding that in Indiana, I can sign this form on behalf of my managing broker. How do I verify this?  And how do I find out if the receiving state requires the signature of the managing broker just for my own edification?  

2.) When signing the listing agreement for the specific parcel of land we are working together on, do I still sign the listing agreement or does it technically need to be signed in by the receiving broker since it is in their state of licensure and not mine?

Thank you for any guidance in advance!