23 CAR § 373-203
(a) A negotiation under this section may be conducted by any method, technique, or procedure authorized under the contract or agreed upon by the parties, including, without limitation, negotiation:
(5) By any other method that permits the parties to:
(c) To facilitate the meaningful evaluation and negotiation of the claim, the parties may exchange relevant documents that support their respective:
(d) Unless the parties agree otherwise, each party shall be responsible for its own costs incurred in connection with a negotiation, including, without limitation, the costs of: