From the instructions I read
Landing FlightID L [runway]
- Arrivals must be within 3,000 ft of ground level to accept a landing clearance.
as well as
Landing clearances will only be accepted if the ACTUAL heading of the airplane is within +/- 60 degrees of the runway centerline (for 27R / 27L, this is 270) and the ACTUAL altitude is 2,000 ft (or close enough to this value to intercept the approach glide-slope).
What is correct - or is there a difference?