_{2.3 Certification of aircraft and equipment
It is important that certification requirements, both for the entire aircraft and installed equipment, are proportionate for the intended operation. The demand for increased instrument flying qualifications will not substantially increase if the availability of aircraft appropriately certified and equipped for flight under IFR in the relevant airspace does not exist. To this end, the following issues should be taken into account:
— proportionate requirements for the initial certification of light aircraft for flight under IFR; and
— consistent and proportionate requirements for matching the reasonable capabilities of avionics and their associated installations with appropriate performance-based navigation (PBN) airspace specification requirements.}