One who stands for another
To give authority to another
To give duties to another
A delegate must be a member of the association.
He was a prominent member of the Republican party, and in 1861 was a delegate to the Peace Conference in Washington.
He was overwhelmed, but he wasn't ready to delegate – not to her, anyway.
In 1778 he was chosen a delegate to Congress, but declined to serve.
They could not delegate the service on pain of death.