But, I also think that most competent ...appraisers would be able to conclude--after reading two separate reports--which one is more "restricted" and which one is more "self-contained".
Your very verbiage is ambiguous.
The "standards" - reporting options - are "Restricted", "Summary" and "Self-contained". John Widdoss, MAI, past Pres of ASFMRA, instructor deluxe, said once "I don't know what a "self-contained" report is... He was working on a valuation of geo-thermal power plant at the time and the 700 page report was a "summary"...
I have repeatedly heard instructors preach that the option is that of the lowest common denominator.... If one statement required by USPAP is summarized in a 1,200 page report, then it is a summary, no matter how much detail lies in the remainder of the report. If say, zoning is stated "Zoning is C2" without further explanation, then the report is restricted no matter what else the report contains or whether it is labeled "summary" or not. The absurdity of that logic is built into the 3 reporting options.
The forms have a format - UAD now - and that is a summary. It is not the only summary option. So? I just finished a 39 page "summary" report. I could have labeled it "restricted" and who is to vet it otherwise?
Eliminate the standards and we have--what?
Pre-1994. Were reports from then so muddled no one could understand them? Were we in appraisal purgatory before the scales fell from our eyes in the true white light of USPAP brilliance as the PTB pulled back the curtain of our ignorance? Nah. Everyone raised bloody L about it then... We also got "limited" and "complete"...terms that are now eliminated but not before the word "limited" completely tainted our lingo.
Prior to 1994, narrative reports were typically described as "full" reports and "limited" reports. It was descriptive of the detail of the report. A 20 page report was likely a Limited reporting format, whereas the "full" report implied all three approaches and a more detailed report. And guess what they called "form" reports? ...duh, "Form" reports. How quaint. Terminology that really described what was what.