Did you even bother to read the article? Yes, it has to be labeled as spam, but the label isn't defined. As a matter of fact, the label is up to the spammer to decide! The FTC is PROHIBITED by this law from defining the label. So how are you supposed to filter out mail based on an arbitrary label defined by the sender?

I'm not happy with this law either. It's not going to reduce spam. However, not to be the total pessimist, I have always had the impression that most laws sketch out basic guidelines that are then spelled out explicitly by regulations from the exectutive branch (FTC, FCC, etc). Does it really explicitly say the FTC is prohibited from indicating how spam must be labeled? My interpretation is that the law's intention is to mandate the executive branch to spell out how messages should be labeled. I could be wrong.