A platform plank is not a law, let alone the procedural material that would go along with a law. There is no need for a party platform to go into that level of specificity. The plank does not, and should not, address the implementation issues.
The same goes for the opposite. If you had a party plank proclaiming the right to abortion, you wouldn’t expect to see issues such as parental consent, going accross state lines or even viabilty to be addressed. Those are not convention considerations, they are legislative ones.
This party plank expresses an overarching goal - to protect all human life, and to extend that protection to the unborn. Any questions about specific procedures or distinctions won’t be at the GOP party level. This is a valid discussion to engage when legislation is actually being considered.