You can get it certed lower than 100mm. Make sure you get the wheel size you want to run on the cert plate to minimise later issues. You can get more than one size on the plate.
Sounds like you'll need to have the alignment done for cert, but you can get it done after the initial check.
https://www.lvvta.org.nz/documents/infosheets/LVVTA_Info_04-2012_Suspension_Camber_Angle_Guide.pdf