I'm not sure I understand what you mean by its being in the purview of the committee. I'm not aware of all the rules of how the committee works.
In terms of the amendment, I'm not sure that the way the amendment is written will do what you want it to do, because there's always the issue of the way it is written.
Again, the purpose of the bill was really to deal with military people who have no choice, but in fact cannot take their leave. In volunteering, most of the time people can decide to volunteer later or come back earlier to take their leave, and again they will still have 52 weeks after the child is born. If the child is born during the time they are away, they still have 52 weeks after the child is born to take the parental leave, if they want to do so.