Either this was a recording made by someone illegally (and partially?) recording ATC traffic, or it really is a recording released by ATC. I wonder which?
In either case, a prosecution should follow.
Here is a link to over 500 live ATC feeds, provided by enthusiasts from around the world:
All Airport Feeds | Live Air Traffic Control Audio Feeds | LiveATC.net
Listening in is perfectly legal, and it's dead easy to record the conversations on your computer.
In theory in the US, you aren't supposed to pass on what you hear, but it is rarely enforced for radio transmissions that are available to the general public, so there won't be any prosecution. Recording private mobile or cordless phone conversations and passing them around would be more likely to get someone in trouble.
The laws about radios vary around Europe, but in most countries enthusiasts regularly use radio scanners to monitor ATC conversations without being bothered by the police. In countries that have more restrictive laws, like Austria and Italy, they just try to be a bit less obvious when they use them. No problem in countries like the Netherlands or the UK.
I might add that some enthusiasts even record ACARS transmissions, and there are similar enthusiast groups that monitor railway communications, as well as those for shipping.