Developing Core Values

Oregon - S.W. Washington Region has developed some core values they keep in mind while they do ministry. At first I thought this had to be something from National, but doing a google search on "young life" "8 core values" , only one site came up, and it was this region's. These are their core values, they've apparently developed on their own.

I'm interested to know if other regions/areas have developed their own and how that process works. Who's involved? Do you re-evaluate them from time to time to address changes in leadership or youth culture?