 Along with races and timing events under the rules of their respective sanctioning bodies, the operators of the track have instituted official rules as of 2019 that govern the measurement and certification of lap time on the Nordschleife, with measurement over the full length of the track timed with a flying start.For the announcement of production car lap times, submission of an official announcement, accompanied by an on-board video with telemetry, and a mention of the tyres used have become customary.The German magazine "sport auto" publishes its "Supertest" of cars, in which the lap time (usually driven by editor-in-chief Horst von Saurma) at the Nordschleife is the most discussed result.