Article 41.1 Sporting Regulations

Article 41.4: Whilst the race is suspended : - neither the race nor the timekeeping system will stop, however, in accordance with Article 5.3 the length of the race suspension will be added to the maximum two hour period ; - cars may be worked on once they have stopped on the grid or entered [...]

Source: http://joesaward.wordpress.com/2011/05/29/article-41-1-sporting-regulations/

Jack Brabham† Bill Brack Ernesto Brambilla Vittorio Brambilla