According to the rules sent to the IJN in frame 1, 2, 3 & 4 anyone who first flew an D3A1 or B5N2 got a second life in a plane of their choice. However, they had to fly one of those planes their first hop and then could fly a plane anytime later in the frame for their 2nd hop.
Daddog decided on this because he required the B5N2 and D3A1 to be flown. The B5N2 has no guns .. so its not much fun and the D3A1 is another plane he deemed that pilots would objected to being forced to fly. Therefore to make up for having to fly these two specific planes he gave them a second life in the rules.
This was in his correspondence for each frame. And was reiterated by myself as setup CM in frame 1 & 2 during the frame and in frame 3 when I helped sling.
Both sides got 2 frames to fly as the IJN with this rule in place. There were violations of this for both sides during the frames (see the following thread):
http://www.hitechcreations.com/forums/showthread.php?threadid=87646However, they were not massive .. frame 1 quick glance 2 and in frame 4 quick glance 3.
I personally would not say that either team cheated in their frames as IJN. There were however, individual exceptions (sporadic) which unfortunately happens when the CMs try to rely on the honor system of people policing themselves and not upping when they see the fields are open. This has always been a problem with allowing people to reup during an event.