Oct.16 (GMM) F1 team bosses have now reached an agreement about how to go about continuing to voluntarily regulate private testing in 2008.

A shake-up of this year's accord has been on the cards for months, with chiefs including BMW's Mario Theissen arguing that it is too restrictive on young drivers being given opportunities to drive.

From next year, four days will be exempt from each teams' testing restrictions exclusively for rookies who have less than 4 days of formula one experience over the past two years.

The basic structure of the 2007 agreement will otherwise be retained, with the exception that testing next year will take place between Wednesday and Friday, rather than Tuesday to Thursday, in order to give primary drivers more time to return from races.

There will be eight tests during the 2008 season, sport1.de also reported, excluding those in the winter period.