Having just done an IVA I wasn't asked for any photos of anything, although he could see the seatbelt mounts, which he failed as I had used split spring washers they cannot be used on any part of the seatbelt mount/brackets although they came with the kit. The other one on seatbelts is you have to be able to take the bolt/nut out/off with a single spanner so one end has to be captive, as said mine was not a RH so fixings might be different I used 8.8 nuts & bolts which wasn't acceptable.
You will need the VIN stamped into the chassis somewhere on the offside in the engine bay area, you will also need a plate with the VIN number which can be riveted onto any surface in the cockpit https://www.ebay.co.uk/sch/andygallecher/m.html?ssPageName= will make up whatever you want. I had the MEV logo, the Make, Model, Vin, My name, Colour & year of manufacture.