The RAAus requirement is 3; Extract from tech manual; 3.1.3 STAGE INSPECTIONS To provide assurance of appropriate processes and construction techniques during the build process, a minimum of three staged build inspections should be carried out by an RAAus L1 (approved by the HAM on evidence of having previously constructed an amateur built aircraft), L2 or L4 maintainer. These staged build inspections of the aircraft should be conducted at key points of the construction of the aircraft, including, but not limited to, prior to closing of structures, engine installation, painting, rigging of primary flight controls and or wings, etc. Once each build inspection is complete, advice of completion is to be supplied by the stage inspector to RAAus using Tech Form 002 - Stage Inspection Amateur Built Aircraft within 14 days. The form is retained in the aircraft file at RAAus. Recording of the build inspection should also be entered in the aircraft builder’s log.
SAAA will have their requirements; They will advise what is required if he does not know or have questions. Not doing them can end in a world of extra work and hurt.