I'm not familiar with a 40 year recertification inspection. I think, jmo, that the 40 year inspection is a long process and have read that it is. Not one person, but a whole lot of building experts on each area of building. Plumbing, electrical, structural, water etc...They may have passed a yearly local inspection or more likely one inspection on work completed on one or more areas the 40 year process flagged is my opinion.