Current chair Michael Cooney and existing Trustee Dame Susan Devoy have chosen not to stand.
Deputy Chair Bruce Cronin thanked them for their service.
"I take this opportunity to thank both Michael and Susan for their outstanding service to TECT," he said.
"Michael has been the Chair since 2002, and TECT would not be where it is today without his considered and exemplary leadership. Dame Susan's profile in the community, valued contribution and extensive networks in the Bay will also be sorely missed by Trustees."
The election is being carried out by both internet and postal voting.
Consumers can only vote using one method. If votes are received by both internet and post from the same consumer, both their votes will be invalid. Each consumer is entitled to one vote irrespective of how many power connections they may have.
Any queries about the election of Trustees or eligibility to vote can be made to the Independent Returning Officer, Warwick Lampp, on the Election Hotline 0508 666 337.
