What it does
A plain-language summary is coming. Here is the official summary from the Congressional Research Service:
Holcombe Rucker Park National Commemorative Site Act This act designates Holcombe Rucker Park, in Harlem, New York, as the Holcombe Rucker Park National Commemorative Site. The act also allows the Department of the Interior to enter into cooperative agreements with appropriate entities (e.g., New York City) for interpretive and educational purposes related to the site.
How Congress voted
This law passed by voice vote or unanimous consent, so there is no record of how individual members voted.