There are no expected changed coming in the future. This is the law you will follow.
Read the Law here
The layman's terms are simple:
You need to test for Brucellosis and Tuberculosis yearly, and the Cost if something you will cover and will be based on your vet's charge and your herdsize (it maybe $100, it may be $1,000).
Have a solid herdshare agreement that includes an acknowledgement of "risks" mailed to the Department of Agriculture with your and the buyers name, numbers and addresses
West Virginia Department of Agriculture
Building 1, Room E-28, 1900 Kanawha Blvd E, Charleston, WV 25305