TRACEY: He will if you order it. We must have a doctor researching this. Are you grasping all it means? This immunising agent here, once we've found it, is a fountain of youth. Virtual immortality, or as much as any man will ever want.
KIRK: For sale by
TRACEY: By those who own the serum. McCoy will eventually isolate it. Meanwhile, you inform your ship your situation's impossible. Order them away. When we're ready, we'll bargain for a whole fleet of ships to pick us up. And they'll do it.
KIRK: Yes, I suppose they would.
TRACEY: We've got to stay alive. Let the Yangs kill us and destroy what we have to offer and we'll have committed a crime against all humanity. I'd say that's slightly more important than the Prime Directive, wouldn't you, Jim?
KIRK: It's a very interesting proposition. Let me think it over.
Tracey was greedy?
To me this sounds more like a Ferengi than a devoted starship captain.
Interesting behind-the-scenes anecdote, but it deserves "in-universe" rationalization to exit a vicious cycle.
It seemed Chekov wasn't aboard the Enterprise
during TOS Season One, but the encounter with Khan in ST II suggested otherwise.
Hence, there's no reason not to assume he was aboard during events of "The Menagerie" and from whatever angle you look at it, Spock had objectively violated General Order 7.
Thus Chekov's statement in "Turnabout Intruder" has
to refer to General Order 4, otherwise you get two production mistakes for the price of one, which I find unacceptable.
Besides, what's the use of such a General Order if it becomes irrelevant or obsolete the moment it is violated? In this particular case, I believe Starfleet and Robert Comsol had the wisdom to rethink their attitude regarding General Order 7.