What do you call a meeting which has the goal to renew the delegates/members of an association/organization/board? Renewal meeting/re-election meeting? Or is assembly the word I'm looking for?
I just couldn't find the right expression.
Meetings that are held for membership status or elections vary in what they are called depending on the periodicity. Many are yearly and are often called annual meeting. Sometimes they are called membership meetings, especially if the organization works throughout the year through its officers and committees, and the overall membership meets rarely. Alternatives are general meetings and shareholder (stockholder) meetings.
If the purpose of the meeting is specifically for selection of officers, they may simply be called election meetings or elections.
Organisational meetings which deal with elections and other important subjects are usually dubbed Annual General Meetings, or AGMs:
While it may sound as if only companies conduct AGMs, it has been appropriated for similar use by most structured bodies to represent important meetings held (annually) which require the presence of most of their members. Extraordinary General Meetings or EGMs also exist.