H. R. 400 aims to stop the United States from giving money to the United Nations Human Rights Council. It requires the Secretary of State to withhold from the U.S.'s regular budget contribution to the United Nations an amount equal to the share that would go to this Council....
Simple Explanation
The bill says that the United States should stop giving money to a group at the United Nations that talks about human rights, and if they do stop, they don't have to pay it back later.