I am going to go out on a limb here, as I am really not supposed to post in this area Since I am a registered supplier,so mods please forgive me,and move or delete as needed.
Boletus, to answer your question some what. When FDA regs do come down, and this is only my opinion, since you seem to be more versed in this than me, is that when it does, it will still NOT be A stipulation that I or others will have to show the general public anything of which you ask for.
If I consider as many of us do, ingredients to be part of a trade secret then I in fact would only have to show governmental agencies and not the general public. Paper work and proper testing is what they will be looking for. So i think that it will be up to each individual/company to decide for him or herself what they put out into public domain.
I hope this helps.
I Know you can't engage in Certain Types of Discussions in Certain Areas because of your Supplier Status.
But I Don't think people in This Thread are Looking for Disclosure of Ingredients such as Flavorings or Sweeteners. As they are Quality and Purity Assurances of the 3 Base Constituents that make up an e-liquid.
Nicotine Base
Added PG
Added VG