it actually sounds like an old requirement more than a new one, as the current trend isn't on tightening up requirements but instead loosening them. You don't have a whole lot of time left, but...you have more than enough to study up hard for the interview and...get your ATP written done, it'll be one less thing to worry about later. Also, i'm sure you'd feel far better knowing that you have everything completed before going to the interview, heck, if the floor is level, and you're the only one with an ATP written, you're a step above the rest, but if someone else has it and you don't, you're now subpar.