It is indeed "Code of Honor"! Here are the explanations...
1. The wrong century... Picard gets the century wrong on the gift to Lutan.
2. A cloak... Lutan says honor protects one like a magic cloak.
3. One suffices... Yar tells Lutan that even though she can make 2 or more holographic opponents, one is really enough.
4. Backstabbing... Tasha's final blow to Yareena was a stab in the lower back.
5. An unusual log... A log entry uses two numbers past the decimal, an extremely rare case.
6. A new joke?... Data first thinks an order from Picard was a new joke.
7. Proper value... Picard tells Lutan that he too knows the proper value of women.
8. Powerful display... The Enterprise detonates torpedoes just above their atmosphere in a display of power.
9. Broken bond... Yareena was dead and brought back, which broke the marriage between her and Lutan.
10. A weapon understood... Yar says she understands the weapon she is equipped with.
11. Extra time on the Bridge... Wesley got to man a station a couple times, and the ladt time Riker forgot to have him relieved. This was before he was made an Acting Ensign.
12. A speech about technology and civility... Hagon tells Picard they may be advanced in technology but not in civilized behavior.
13. Shaving efficiency... Geordi tells Data the razor he made is too efficient and can shave too close.
I ran out of clues, so I had to go a little more obvious. Good job! Your turn, Orph.