Shipment::needShip

public function needShip()
{
	if ($this->fields->isChanged('DEDUCTED'))
	{
		if ($this->getField('DEDUCTED') === "Y")
		{
			return true;
		}
		elseif ($this->getField('DEDUCTED') === "N" && $this->getId() != 0)
		{
			return false;
		}
	}

	return null;
}