All licensed DC taxicabs are required to have the new standardized dome light installed by November 1, 2013. Vehicles found not in compliance will be impounded. An owner whose vehicle is impounded for failure to have a dome light will be required to pay all fees and costs associated with impoundment. The new standardized dome light will display the Public Vehicle Identification Number (PVIN) which is a combination of one letter and three numbers. See below for the list of approved installation companies to order and schedule installation of the new standardized dome light and answers to several frequently asked questions regarding the PVIN as it relates to the new standardized dome light.