Nope! Their eligibility and application instructions are here. They even offer digital cards for access to their online resources if you're not able to travel to Boston for a physical card. (Tip on that: if you're trying to borrow an ebook that has a waitlist, your BPL card grants you borrowing privileges to something like 7 or 8 other library networks in MA, and usually you can find an available copy of the ebook through one of them!)