Evidentiary basis for finding "that the manner in which students dress affects both their performance and behavior at school."

To Whom It May Concern:

Pursuant to the California Public Records Act (California Government Code §§ 6250), I hereby request the following records:

The Burbank Unified School District Parent Manual says that "The Board of Education has determined that the manner in which students dress affects both their performance and behavior at school" -- what is the evidentiary basis for this determination?

I can find no solid evidence to support this determination. Literature reviews and metanalyses suggest that the evidence for this is thin and contradictory, e.g.:

http://files.eric.ed.gov/fulltext/ED537953.pdf
http://eric.ed.gov/?id=ED471528
http://www.hwdsb.on.ca/wp-content/uploads/2015/07/Uniform-BLAM.pdf

What studies, meta-analyses and literature were used to make this determination?

The requested documents will be made available to the general public, and this request is not being made for commercial purposes.

In the event that there are fees, I would be grateful if you would inform me of the total charges in advance of fulfilling my request. I would prefer the request filled electronically, by e-mail attachment if available or CD-ROM if not.

Thank you in advance for your anticipated cooperation in this matter. I look forward to receiving your response to this request within 10 calendar days, as the statute requires.

Sincerely,

Cory Doctorow