6.3.2 Vertical accuracy for APV BARO*VNAV operation.
a) Altimetry System Error (ASE)
Altimetry system performance is demonstrated separately from the APV BARO*VNAV certification through the static pressure system certification process. With such approval (e.g. CS 25.1325), each system must be designed and installed so that the error in indicated pressure altitude, at sea*level, with a standard atmosphere, excluding instrument calibration error, does not result in an error of more than ±9 m (±30 ft) per 185 km/hr (100 knots) speed for the appropriate configuration in the speed range between 1·23 VSR0 with wing*flaps extended and 1·7 VSR1 with wing*flaps retracted. However, the error need not be less than ±9 m (±30 ft).
7.4 Recommended Function for APV BARO*VNAV operation
AMC 20*27
Item
Functional Description

1
Temperature compensation: Capability to automatically adjust the vertical flight path for temperature effects. The equipment should provide the capability for entry of altimeter source temperature to compute temperature compensation for the vertical flight path angle. The system should provide clear and distinct indication to the flight crew of this compensation/adjustment.
As an operator we make the cold weather corrections if required by the approach limits published.