I want to know the answer to the following question:
What memorandum stated the circumstances for engaging in conflict above the 38th parallel?
All the background I'm provided with is that "On 27 September, MacArthur received the top secret National Security Council Memorandum 81/1 from Truman reminding him that operations north of the 38th parallel were authorized only if "at the time of such operation there was no entry into North Korea by major Soviet or Chinese Communist forces, no announcements of intended entry, nor a threat to counter our operations militarily...". Is that enough to answer the question?
Answer: yes