I am going to be new to travel shortly and I just came across a reference to the "PBDS" as a requirement to an assignment, which had to be passed before housing could be provided. What exactly is this and how often does it need to be taken or required? I took my CCRN in January after 2 weeks of studying (and 25 years as an ICU nurse) and passed without much ado, is this in the same league? Amanda you said you had a study guide, could you also email it to me?