Türkçe term (edited): Makam Göstergesi

Anlam olarak bu karşılıklardan birinin, özellikle de "chair"in gayet uygun düşeceğini düşünüyorum.
http://www.thefreedictionary.com/chair
chair
2. a seat of office or authority.
3. a position of authority, as of a judge or professor.
4. the person occupying a seat of office or authority, esp. the chairperson of a meeting.

http://www.thefreedictionary.com/seat
Seat
10. (Government, Politics & Diplomacy) a membership or the right to membership in a legislative or similar body
11. (Government, Politics & Diplomacy) chiefly Brit a parliamentary constituency
12. (Stock Exchange) membership in a stock exchange

authority
1. the power or right to control, judge, or prohibit the actions of others
2. (often plural) a person or group of people having this power, such as a government, police force, etc.
3. a position that commands such a power or right (often in the phrase in authority)
4. such a power or right delegated, esp from one person to another; authorization: she has his authority.
5. the ability to influence or control others: a man of authority.
9. (Government, Politics & Diplomacy) (capital when part of a name) a public board or corporation exercising governmental authority in administering some enterprise: Independent Broadcasting Authority.