The Standing Orders are clear on this matter. I refer the members to Standing Order 119, which reads:
Any member of the House who is not a member of a standing, special or legislative committee, may, unless the House or the committee concerned otherwise orders, take part in the public proceedings of the committee, but may not vote or move any motion, nor be part of any quorum.
Any member can participate. It's very clear in Standing Order 119. That's how we govern ourselves.
This has been debated in other committees. It's been dealt with. It's in the Standing Orders, Chair.