Napier BHS School principal Matt Bertram said because of Covid-19 level 2 restrictions on larger gatherings, limiting attendance to no more than 100, only players, team management and officials will be allowed at the games.
"We are asking the school community to respect that," he said. "We would not want to compromise our ability to use the grounds."
The First XV will also get to play on McLean Park next Thursday for its annual Polson Banner match against Palmerston North Boys' High School. It will also be a no-go venue for the fans if the level 2 alert continues, but it will be televised.
Other sports in the annual exchange will also be held at closed venues.