M Legg --
... is onto the magic intent of AO-26 -- Something akin to pretending you aren't helping support Rush Limbaugh's drug habit by being complicit, complacent or a naughty enabling physician who caters to celebrities.
Or, are we appraisers involved in some clandestined business requiring AO-26 goobledygook.
It all started with the "Ten Commandments," I mean the "10 Standards Addenda," or "Whatever." And the people who write this stuff are hired and paid to do just that. Almost every words of USPAP can be cross-referenced until Kingdom Come. That means, eternally! There's no end available, or in site.
Hey, appraisals are passed around like illicit drugs. Your "dealer" knows where you last appraisal is, but only cares about the price of the competiti, not the purity!
Over simplification: You just have to start a new work file, redact any juicy confidential tidbits, change the client name and address and make out a new invoice. UNLESS, of course, the new client wants a new effective date.
Smile.
L- MN