Looking a gift cow in the mouth

BBC NEWS | UK | US rejects British Katrina beef: "The US has blocked the distribution of around 350,000 packaged meals donated by Britain for victims of Hurricane Katrina, because of mad cow disease.

US officials said the meals - routinely eaten by UK soldiers - were not considered unsafe but fell foul of its post-BSE ban on British beef products.

"

I wonder why there is a "post-BSE" ban still in place?