All of those statements need to be referenced.  Leaving an article unreferenced in every section opens the door for original research and the introduction for factually inaccurate information.  To point out one thing, I'll bring up Consolidated Appropriations Act, 2012.  First, it has a number of tags on it, the creation of articles that need to be tagged should be reason number 1 to remove the flag.  Second, the only reference/link provided on the article is this one while the information is from various subpages of that.  It appears that the entirety of the article is found at this deeper link.  It's possible that some came from this as well, I can't tell.  I'll also note that the style of the summary it was taken from was never meant to be encyclopedic, so the article is riddled with grammatical errors, mostly incomplete sentences.  On creation, the opening read "Consolidated Appropriations Act, 2012 (H.R. 2055) is a bill passed to the 112th United States Congress"  I've never heard this usage (to rather than by) and assume it is incorrect, another editor changed it, the lead is also missing an important determiner.  In any case, you can take a look at  Vesey