BP's rules: here's a CNN vid from YouTube

The National Guard???

... and, oh, yeah: "BP has not enforced this provision..." is NOT the same as "BP WILL NOT enforce this provision..."
... so long as folks signed the contract, I'm pretty sure the law would be on BP's side if BP decided it would deny pay to any worker who was discovered to have talked... maybe in a month or so. "Sorry, Larry - you talked to CNN. The contract you signed made it clear this was not allowed. You violated the contract. Thanks for the free labor!"