Mr Blunt says that, for carmakers wanting to trade between Europe and the US, "there is a regulatory wall - different sets of standards that have technical differences but we believe achieve the same ultimate result… the same high levels of environmental performance and safety".
There cannot be different sets of standards or regulations between different members of a customs union, for that would allow a country to subvert the common tariff.
This has hampered efforts to develop so-called cloud computing services, in which personal data sometimes crosses national borders, subjecting Internet companies to different sets of standards.
But to the extent that naturalism is prescriptive and cannot rely on an implicit procedure that is already in place, it owes us an articulation of how to balance different sets of standards.
But if they are not, then how do we justify the existence of different sets of standards for different groups of people?
Manufacturers have warned about the prospect of two different sets of standards, while truckers have worried about the costs of upgrading to cleaner vehicles.
The result is that there are 50 different sets of standards across the nation, and a student who moves from North Carolina to South Carolina may face a very different set of requirements.
The rise of Common Core doesn't just mean an added emphasis on test results and teaching-to-the-test in classrooms, it also streamlined the market for testing, meaning that developers are no longer beholden to fifty different sets of standards, allowing them to make one product, aimed at everyone.
A whole experiment involving three different sets of standards and deviants lasted up to 40 minutes.
There are a couple of different sets of standards, but in general, the lower the number, the cleaner the cleanroom.
