Entries are taken annually. An entry for this year only covers the 2010 season. The details of the new Concorde Agreement will, presumably, be different from past versions but the CA is always a 3-way document. It's possible that FOM has a clause whereby a team is deemed to be dead (from the commercial side) after 3 no-shows. As far as the FIA is concerned the teams have always signed to appear at every race. If you recall, in the past failing teams have got round this by turning up but doing things like intentionally failing to qualify. At present that's not an option because Qualifying doesn't truly exist now & a team would have to have a car capable legally (crash-tested & homologated) to be fit to qualify, anyway. Payments to the teams have also changed. I think the top 10 teams will now be paid. Historically, there was a very good reason for not paying the last few entrants. It stopped the cruise-'n-collect outfits who were less interested in racing than picking up the proceeds or using F1 fo less savoury purposes ;-) It meant that only teams serious enough about making the grade race-wise were paid. In theory, if USF1 were allowed to miss races & ended up at the bottom of the table, they wouldn't receive money from the TV rights etc. They would, presumably, still get Bernie's perks & 10 million if they didn't breach any contract rules with him but I don't think Bernie is dumb enough to sign away money to a team who don't actually produce a car. It's all supposition, though, because the details of the CA are kept secret.

One thing is painfully obvious, Bernie did a horrible job making sure that the new teams could afford to be in F1.  Bernie seems anti-American as he must have known full well that USF1 would be a laughing stock.  This clearly will set Formula 1 in the United States back years.  This may be enough to destroy any chance of F1 in the US market for decades.