So he got some clarification from his first second-round interview yesterday. And you are correct Sunrig. At least for the regional he interviewed with yesterday, they claimed that they will not initiate PRIA until the applicant has been assigned a class date for training and it is close to said starting date. Which, as far as I am understanding it, is like this CJO. And if this is true, then yes, there is no need for concern. If my husband is getting class date offers for training (crossing our fingers), that is definitely some certainty and a sign of stability concerning his job prospects in the US. So he can finally inform his current employer of the situation. Thanks Sunrig!
And thanks bafanguy for the clarification on legal terminology. Now I know how to use it for (or against?) my husband. Ha!