Ah, Chinatown buses: chariots of the frugal, the thrifty, the person looking for the cheapest possible way to get up and down the Eastern Seaboard. It’s almost a rite of passage to take at least one spin on the various bus lines which originate from and stop in the District — and even with the ascent of corporate-backed, low-cost, modern-amenity lines like BoltBus and Megabus, people are still scraping out a Jackson to get to New York on the fly. But while more competition might not have sunk the dirt-cheap bus business, a new District law just might.