Which Reference Materials are Allowed During a Chess Match?
In a word: No.

FIDE:


  12.3 a. During play the players are forbidden to make use of any notes, sources of information or advice, or analyse on another
  chessboard.
  
  12.3 b. Without the permission of the arbiter a player is forbidden to have a mobile phone or other electronic means of communication in the
  playing venue, unless they are completely switched off.


The USCF scholastic rules similarly disallow electronics, but do not explicitly address the topic of notes. (Section 21.6)

As noted in the comments, this is because the scholastic rules are just a supplement to the USCF rules. Unfortunately, the USCF rules themselves are not available on the USCF site.

However, section 20C of the USCF rules do prohibit the use of notes. And that prohibition is quite strict (or was in 2014), according to section 15A of this link.