Static Wicks:
According to one 744 CDL, and I paraphrase: 60 installed, despatch allowable with 23 fitted (45 needed if operation requires use of HF and/or ADF). Various comments about distribution of wicks
To certify the CDL for missing winglets, the OEM has to flight test the configuration.
To save cash for an option no one want to pay for, typically only 1 winglet removed is tested.
That's what I've heard.