Well, that's the US version. Apple makes it really difficult to find that kind of document for other regions and their search engine has been simplified to the point of making you have to view hundreds of links in order to find one to a support article. Good luck.
Edit:
Finally found it.
Tax-exempt orders
To place an order on behalf of a tax-exempt organization or individual, please call an Apple Store Specialist at 1‑800‑MY‑APPLE.
You will need to provide proof of tax-exempt status for the address
where the product is being shipped. The organization or individual name
on the order must exactly match the tax-exempt certificate.