Ah, thanks, knew that something was missing
.
Sure, that will work
.
SDK, I think.
Sadly only possible for nukes, via ProjectInfos.xml, the line:

I can't build bomb shelter while I do not finish MANHATTAN_PROJECT. I can do similar like this for some magic project and magic buildings.
Sure, that will work

Where is defined Nuclear weapon ban/unban?
SDK, I think.
When i finish MANHATTAN_PROJECT i can build NUKES, where i can change that, for example need some another project for nukes?
Sadly only possible for nukes, via ProjectInfos.xml, the line:
PHP:
<bAllowsNukes>1</bAllowsNukes>