H.R. 2046 is a bill that requires Congress to approve before any federal property with historical significance can be sold, disposed of, or declared excess or surplus. The bill specifies that this approval process applies to any building, land, structure, monument, or site...
Simple Explanation
H.R. 2046 is a rule that says if the government wants to sell or give away special old buildings or places, they have to ask Congress first. This is to make sure important and old places are not lost without thinking it through.