Whom is a diversity statement written for? This is related to the "what to say in a diversity statement" question, but I'm asking something slightly different:


  Who reads a Diversity Statement in a faculty application (exact sciences/CS/math) at an R1 institute?


Anticipating answers like "anyone on the department can read it", let me be more specific: Who usually reads diversity statements and takes relevant decisions on their basis? Is it faculty members? Is it administrators? Are they generally used as a first screen, as an appendix to the teaching statement, or as a tiebreaker?
The purpose of having a diversity statement is that you can honestly say that you have one if anybody asks.

The people who will read them would include:


People who are told they have to read them.
People who have nothing better to do.
People who want to confirm that you really do have a diversity statement.


Don't assume that anybody takes any relevant decisions based on the diversity stament.  The people who make decisions will either continue to be fair to all candidates, or will continue to be prejudiced.  Writing a diversity statement won't change that.