Restrain a part

This will always be a contentious topic no matter who the expert is, no matter who the inspector is, no matter what the drawing says, no matter what the part is.
Your best bet is to remember this: whenever in doubt, CYA.
That means if you get a part that is questionable on how to mount on the CMM, take pictures, document your process, and reach out to the customer aka engineer, to determine if that is how he/she wants it inspected.
If the part is conforming, take pictures of your process. If the part is rejected, take pictures of your process. As long as you document your process, the chances of you being reprimanded for not checking a part properly goes way down.
When I first started out I worked at a "prototype" shop that was very fast paced and my predecessor didn't fully train me in the fine art of CYA. And ofcourse an incident occurred (no one got hurt) where I was held responsible for a situation where I thought I was doing the right thing, and I was wrong. I was fired. And the entire company did a full internal audit and had to write a completely new Quality Handbook because of me. It sucked but I learned a valuable lesson.

TLDR; CYA

I am starting to get the same responses here, at work.... NOBODY knows! No matter how the part is held, its restrained. You can use double sided tape, tacky gum, these also will pull down/restrain .030/.060 thick aluminum sheet.
I like the notes that say, 'restrain against datumns without exceeding the elasticity of the material' . This note that says to restrain to 10 lb max,,, WHAT!?? Someone mentioned 'load cells".... well, isn't that a grey area also? Having two clamps set at 10 llbs each..?? would that be legal? lol!! I'm going to recommend re-wording this note so the next generation, when I retire, can make sense of it. Thanks for your response

I am starting to get the same responses here, at work.... NOBODY knows! No matter how the part is held, its restrained. You can use double sided tape, tacky gum, these also will pull down/restrain .030/.060 thick aluminum sheet.
I like the notes that say, 'restrain against datumns without exceeding the elasticity of the material' . This note that says to restrain to 10 lb max,,, WHAT!?? Someone mentioned 'load cells".... well, isn't that a grey area also? Having two clamps set at 10 llbs each..?? would that be legal? lol!! I'm going to recommend re-wording this note so the next generation, when I retire, can make sense of it. Thanks for your response