The proposed policy is misguided on many grounds. I will highlight only three.
1. Children need guidance from their parents, who have the moral and legal responsibility for their well-being. The policy explicitly interferes with that relationship by excluding the parents in a crucial area of the children's lives. Decisions about a child's gender should be made with parental knowledge, input and in most cases, with their consent.
2. Children, by their very nature, are young and immature. A fair reading of the policy would seem to allow school authorities and medical personnel to facilitate or at least encourage puberty blocking treatment. There is strong scientific evidence that such treatment is medically and psychologically damaging.
3. Sports activities become a quagmire when children are allowed, at their whim, to decide that they are a male or female from one moment to another. Yet the proposed policy seems to allow it. There have been more than a few publicized cases where it is apparent on its face that a child with mostly, if not all, male physical characteristics, is able to compete against female athletes. The inherent unfairness is self-evident.
There are some laudable goals here. Transgender children should not be bullied. We must act with compassion and understanding. But cutting off parental knowledge and input is a bridge too far.