From the fare rules: Sorry for the format. The last letter in each line is for economy.

RTW BOOKING CLASSES BY CARRIER
CXR FIRST BUSINESS PREMIUM ECONOMY
ECONOMY
A3 C NOTE 1 D NOTE 9 M
AI A NOTE 8 D NOTE 3 H
AC C NOTE 24 Z NOTE 23 E NOTE 28 H
AV C NOTE 1 D NOTE 3 Q
BR C NOTE 1 D NOTE 9 T NOTE 32 M
CA A NOTE 4 D NOTE 5 G NOTE 30 M
F WITHIN CN C WITHIN CN B WITHIN CN
NOTE 6 NOTE 7
CM C NOTE 1 D NOTE 3 H
ET C NOTE 1 D NOTE 3 M
LH A NOTE 8 D NOTE 10 E NOTE 27 M
LO D NOTE 3 Z NOTE 2 P NOTE 31 H
LX A NOTE 8 Z NOTE 11 M
NH A NOTE 4 Z NOTE 2 E NOTE 27 M
F WITHIN JP Y WITHIN JP M WITHIN JP
NZ C NOTE 12 Z NOTE 13 O NOTE 19 M
MS A NOTE 8 D NOTE 3 H
OS C NOTE 1 Z NOTE 2 E NOTE 27 M
OU C Z NOTE 11 H
OZ A NOTE 4 D NOTE 3 M
Y WITHIN KR Y WITHIN KR Y WITHIN KR
SA A NOTE 8 D NOTE 3 H
SK D NOTE 10 Z NOTE 11 S NOTE 18 M
SN C D NOTE 3 M
SQ A NOTE 36 D NOTE 3 P NOTE 31 H
TA/LR C NOTE 1 D NOTE 3 Q
TG A NOTE 25 D NOTE 26 H
TK C NOTE 1 D NOTE 3 M
TP C NOTE 1 Z NOTE 2 H
UA C NOTE 1 Z NOTE 17 A NOTE 33 H
ZH C NOTE 1 D NOTE 9 G NOTE 30 H