In addition to the compliance process specification, the working group shall develop a MOPS for a WAIC component that allows WAIC systems to safely co-exist with Radio Altimeters in the frequency band 4 200 – 4 400 MHz. The MOPS will allow WAIC systems to share the band with Radio Altimeters and other WAIC systems in a way that (a) the safe operation of Radio Altimeters is not compromised and (b) allows the worst-case performance of a WAIC system to be pre-determined.