But I don't think it's right to put specific samples into storage for them to be tested at a much later date when a test for up until then untestable substances becomes available. There has to be some sort of statute of limitations - and 13 years after the fact is way beyond that IMO. (Or why could Riis keep his Tour victory and even be the coach of teams participating in the tour?)
There is a statute of limitations, it's 8 years. So in theory only his 2004-5 should be in danger of been stripped.