As you note, the thresholds are a part of international negotiation and a function of the fact that there is a degree to which net benefit reviews are to be concentrated on those large-scale transactions that are of import to the net benefit of the country, but there's no threshold for a national security review regardless. That includes the nature of the assets that are potentially in acquisition, whether or not they are patents or broader technologies.
On June 7th, 2023. See this statement in context.