I put those in because Pythons were basically Israeli AIM-9s. The Israelis also were limited in what they could get their hands on, so that's where the "Limit: X AIM- 7/9" rule came in. If a player wanted to equip more AtA missiles per week than their allotment, they would need to pay SO's to manufacture the Shafrir and Pythons.
I love this explanation. Thank you.
Any thoughts on the lack of the special rule in 2022? It seems that AIMs are unlimited.