PL 115-45 - Wounded Officers Recovery Act of 2017 131 STAT. 956 (govinfo)
When a bill is passed into law, it is "enacted." A law is first published as a slip or pamphlet. The law is identified with a PL (Public Law) numbers. The Public Law number consists of the Congress number and a sequential number assigned chronologically.
The law is also identified with a Stat (Statutes at Large) number. The Stat number is the number the law will have when it is reprinted in the Statutes at Large.