When several alternative governments are viable, negotiations are in practice guided by constitutional principles that determine which actors are asked to form the government and in what order. (blog.politics.ox.ac.uk)
But out of symbolic respect for constitutional principle, let them be publicly displayed on or at other than government property. (firstthings.com)
Our schools have a responsibility to teach students about constitutional principles not only as part of the curriculum, but also by faithfully applying them. (legalblogwatch.typepad.com)