(a) Notwithstanding any other law, the City and County of San Francisco may impose a tax on each ride originating in the City and County of San Francisco provided by a participating driver in an amount not to exceed the following:

1. (1) One and one-half percent of net rider fares for a shared ride in which, prior to commencement of the ride, a passenger requests through the transportation network company’s online-enabled application or platform to share the ride with one or more passengers and each passenger is charged a fare that is calculated, in whole or in part, based on the passenger’s request to share all or part of the ride with one or more passengers, regardless of whether the passenger actually shares all or part of the ride.
2. (2) Three and one-quarter percent of the net rider fare for a ride other than a ride described in paragraph (1).

(b) Notwithstanding any other law, the City and County of San Francisco may impose a tax on each ride originating in the City and County of San Francisco provided by an autonomous vehicle, whether facilitated by a transportation network company or any other person, in an amount not to exceed the following:

1. (1) One and one-half percent of net rider fares for a shared ride in which, prior to commencement of the ride, a passenger requests to share the ride with one or more passengers and each passenger is charged a fare that is calculated, in whole or in part, based on the passenger’s request to share all or part of the ride with one or more passengers, regardless of whether the passenger actually shares all or part of the ride.
2. (2) Three and one-quarter percent of the net rider fare for a ride other than a ride described in paragraph (1).