AssetStore Guidelines Help

I know that redistribution of the standard assets on the asset store is against the submission rules, but I have some confusion over usage of standard assets working in tandem with the project being submitted.

For E.g. Say if I created a simple weather system, and wanted to incorporate the Unity Global Fog Shader. During play, my scripts handle the changing and lerping of values within the Global Fog Effect making it a required component of the package...

1st Question: Is this allowed? Or must you only use the standard Render Settings fog settings instead? (Or your own self developed fog Post Process Effect/Shader)

2nd Question: If it is allowed and is a required asset...can you include the Global Fog shader in your export package that is to be submitted? Or will this be an "Unavoidable setup step on the consumer side, involving the downloading of the required standard assets.

 

I really want to know this too. Why is it so hard to find this info?