Nobilities of Brunei

I was doing a bit of research for the Civil Service Day article which was published yesterday on Brunei Times. I am sure most readers by now know that the title of the Cheterias and Pehins are like today's Minister. If you are appointed as Pengiran Cheteria or Pehin so and so, you are being appointed as a Minister for a particular portfolio. For instance, Pengiran Derma Wangsa would be the head