Those having the power to determine bar rites correctly (8)

I believe the answer is:

arbiters

I'm a little stuck... Click here to teach me more about this clue!

'those having the power' is the definition.
I can't tell whether this defines the answer.

'bar rites correctly' is the wordplay.
'correctly' is an anagram indicator.
'bar'+'rites'='barrites'
'barrites' is an anagram of 'ARBITERS'.

'to determine' acts as a link.

Can you help me to learn more?

(Other definitions for arbiters that I've seen before include "Bar tries (anag) - judges" , "Authorities" , "They decide disputed issues" .)

I've seen this clue in the Sydney Morning Herald.

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