Fact: All approaches are the captains unless he decides to let the first officer fly it.
One of the most challenging aspects for a captain is judging what you can allow a first officer, you may not have met before, to do. Clearly safety is a factor but we all have a responsibility to challenge the people who will one day be captains themselves. Like it or not we are all involved in the training of the captains of the future. They will, after all, spend more time flying with line pilots than training captains over their career.