"Peter Clark" wrote in message
news
Agreed, but you may not cross an extension of the departure runway
centerline till outside the "D" or with clearance.
[...]

Just to play devil's advocate, why would you need to cross the
extended centerline?

I've never heard that rule, but assuming it exists, I think the situation
where it would be more relevant would be an airport with parallel runways.

Sure would be nice if someone who thinks the rule exists would cite the
regulation where it appears.

Pete