officiate, officiating guest, heartfelt appeal, Erecting Obstacles for Foes Who Won Office

Chávez Erecting Obstacles for Foes Who Won Office
CARACAS, Venezuela, Feb. 11 -- In November, Antonio Ledezma, a well-known opponent of the Venezuelan government, defeated President Hugo Chávez's handpicked candidate for mayor of greater Caracas. It was a particularly bitter setback for Chávez, not just because city hall is such a prized post but...
(By Juan Forero, The Washington Post)

The Guardian

Red card.

A schoolgirl football referee has made a heartfelt appeal for respect after she was sworn at by parents during an under-eights game she was officiating.

Schoolgirl football ref asks parents to stop verbal abuse

Emily Dyke, 14, who was shouted at when she officiated at kids’ games,...

THEGUARDIAN.COM

office (RESPONSIBILITY)
noun [C or U]
a position of authority and responsibility in a government or other organization:
the office of vice-president
As chairman of the association, he held office for over twenty years.
The socialist party have been in office (= governing)/out of office (= not governing) for almost ten years.
She's held various offices during her time as a minister.

officer 
noun [C]
1 a person in the armed forces who has a position of authority:
a naval officer
a top-ranking officer

2 a person who has a position of authority in an organization:
a careers/customs/personnel officer

3 a form of address for a member of the police force:
"Were you aware of the speed you were driving at, madam?" "No, officer."
Officer Clarke will show you where to go, sir.

official
noun [C]
a person who has a position of responsibility in an organization:
a government/trade-union/council official

official 
adjective
1 relating to a position of responsibility:
He visited China in his official capacity as America's trade representative.
Number Ten Downing Street is the British prime minister's official residence.
NOTE: The opposite is unofficial.

2 agreed to or arranged by people in positions of authority:
The official photos of the prime minister's tour of India are in the magazine.
The queen will attend the official opening of the theatre in June.
There is to be an official inquiry into the incident.

3 If a piece of information is official, it has been announced publicly with authority:
Their engagement is now official.
Inflation has fallen below 2%, and that's official.

officialdom Show phonetics
noun [U] DISAPPROVING
used to refer to those people who have a position of authority, especially in government, usually when they are preventing you from doing what you want to do or are slow or not effective

officialese
noun [U] US
the language often used in government documents which is formal and often difficult to understand

officially 
adverb
The royal engagement was announced officially (= with authority) this morning.

officiate 
verb [I] FORMAL
to be in charge of or to lead a ceremony or other public event:
A priest officiated at the wedding.

officiate

əˈfɪʃɪeɪt/

verb

gerund or present participle: officiating

1. act as an official in charge of something, especially a sporting event.

   "three judges will officiate at the two Grands Prix"

   synonyms:

   preside (over), take charge, be in charge (of), be responsible

   • perform a religious service or ceremony.

     "he baptized children and officiated at weddings"