'Official members', unofficial members', ex-officio members'

Well...let me try to explain it in a simpler way :P
As you know, the Executive Council (Exco) & the Legislative Council (Legco) were both under the Governor in the past political structure of HK.
The three types of officials metioned were actually under the Legco.


圖片參考：http://i146.photobucket.com/albums/r270/jennyng0427/-0175.jpg

ex-officio members:
- British
- appointed by governor
- top officials
- the financial secretary was included too

official members:
- British
- invited by the govt
- received salaries from the govt


unofficial members:
- British merchants
- not paid
- reflected opinions from HK citizens


**further information will to be added if necessary because I haven't got my textbk in hand. I typed this through reading my notes.

Hope it helps!

2008-10-09 22:40:58 補充：
Re:

Sure. Ex-officios were the toppest ones among three. (as mentioned by my history teacher)