IVA requirement

[Numplumb]

Hi what is required for security by the IVA?
I have a MX5 build the donor parts were sourced from a 93 mk1 but I don't have any donor documents (so will be Q plate ) the ecu is none immobiliser type it did come with a Sigma alarm which I don't have the wiring instructions for I have worked it out to cut the starter motor when armed, so I have steering lock and cut out will that do?

Regards MIck.