Marae do not operate by themselves. People run marae. When a kaupapa (occasion) happens whānau or iwi kainga (home people) will man the kitchen. They do the work to prepare and put food on the table. Their support is because of whakapapa. The mana of the manuhiri (visitors) is uppermost and ultimately the mana of their marae. Everyone pitches in to carry the load.
Whaikōrero is a taonga of immense mana so it must be regarded with respect and dignity. To be the spokesperson of the iwi carries responsibilities to do it to the best of one's ability. Being the face of the people and expressing their thoughts and ideas is not a frivolous task. Respect, care and aroha are vital if the iwi is to be represented well.