I'm not finding an actual Windows 10 hardware certification requirement document. Yet Windows 10 is out and shipping pre-installed on hardware, so how can there not be a document somewhere?

"The precise final specs are not available yet, so all this is somewhat subject to change, but right now, Microsoft says that the switch to allow Secure Boot to be turned off is now optional. Hardware can be Designed for Windows 10 and can offer no way to opt out of the Secure Boot lock down." http://arstechnica.com/information-technology/2015/03/window...