If you thought Uber managed to confound D.C. legislators, just wait for SideCar. The new ride-sharing service, which allows just about anyone with a car to be a cabbie and be hailed using a smart phone app, is set to arrive in D.C. today, reports NBC4:

SideCar is a service where anyone can sign up to be a driver and some passengers don’t even have to pay. It’s set to launch by the end of the week.

Drivers who want to be part of the operation have to pass a background check. Once accepted, riders can track drivers using the SideCar mobile app. At the end of the trip, a payment donation is expected. Passengers will be able to see what a similar trip in a cab would cost. Pay too little or give no donation and you could get flagged as a bad customer.

The company, which is already in operation in New York, Chicago and San Francisco, said it has provided more than 100,000 thousand rides without an incident.

D.C. Taxicab Commissioner Ron Linton told NBC4 that the service will likely push legal boundaries in the city, and it could be left to the D.C. Council to find a way to accommodate it.

Last week the commission published proposed rules for dispatch services like UberTaxi, myTaxi and Taxi Magic, though they are seemingly silent on the DIY-style taxicab-like service offered by SideCar.

Still, the one thing that might sneak SideCar past regulators is the fact that users aren’t exactly “paying” for rides—they can offer “donations” to the driver once they get dropped off. In theory that’s not very different than D.C.’s slug lines, only that a person would be using their phone to find a driver. Additionally, the service is careful to say that it’s “neither a taxi nor a limo service”—both of which requires licenses and adherence to a long list of regulations.

If D.C. regulators do have any issues with how SideCar operates, they probably learned from the year-long Uber saga that going about finding a resolution quickly and quietly is probably best.