Wake turbulence separation question

[Chris Mauro]

What is the difference?
1.
f. Separate IFR/VFR aircraft taking off behind a heavy jet/B757 departure by 2 minutes, when departing:

NOTE-
Takeoff clearance to the following aircraft should not be issued until 2 minutes after the heavy jet/B757 begins takeoff roll.

1. The same runway. (See FIG 3-9-4.)
2. A parallel runway separated by less than 2,500 feet.

2.
. Separate aircraft behind a heavy jet/B757 departing or making a low/missed approach when utilizing opposite direction takeoffs or landings on the same or parallel runways separated by less than 2,500 feet- 3 minutes.

[Mike Fries]

What is the difference?

Separate aircraft behind a heavy jet/B757 departing or making a low/missed approach when utilizing opposite direction takeoffs or landings on the same or parallel runways separated by less than 2,500 feet- 3 minutes.

example:
If a heavy departs 28R at SFO, you have to wait 3 minutes before an arrival or departure to 10L or 10R

[Chris Mauro]

Now I gotcha, thanks Mike