I could begin with a general comment that goes back to the integral nature of article 21, to the overall fabric of the convention itself. It is not an exception to the convention, it is part of it. So when one looks at article 1 and its reference—and this goes back to an earlier question—to never under any circumstances engage in particular activities, that must be read as never under any circumstances except those permitted by the convention itself.
On November 7th, 2013. See this statement in context.