It is pretty straightforward, so there isn't really that much to add to what you have before you. It's a chance to ensure that MPs from non-recognized parties are able to move amendments during the committee process. Originally, following a ruling of your predecessor, the independent MPs couldn't propose any amendments to committees. This is a change that would allow them a greater voice and an ability to do so.
On May 3rd, 2016. See this statement in context.