The Open Group's list of 20 sample architecture principles starts a few screens down at the following URL:

http://www.opengroup.org/architecture/togaf8-doc/arch/chap29.html

A recent and very concise list comes from NIH:

http://enterprisearchitecture.nih.gov/ArchLib/Guide/EnterprisePrinciples.htm

The Wisconsin (state) Enterprise Architecture Team principles are found through links on the following page:

http://weat.wi.gov/section.asp?linkid=252&locid=9

Note that this is a case where the principles were carefully crafted and then became mere "shelfware"

The US Department of Education published architectural principles back in 1999:

http://www.ed.gov/offices/OCIO/archived_information/downloads/prin.pdf