Do not wear nail polish.
Women should only wear a limited amount of jewelry.
Shoulders and arms must be fully covered (no strapless tops, no tank tops, no short sleeve shirts.)
Do not wear green. (Explained later as the color of Hamas)
Closed-toe shoes, women should also wear stockings.
NeoCon Express has some photos that show "modest" Israeli girls.
Barack Obama was of course confusing the multi-cultural, democratic country of Israel with the Islamic theocracies that mostly surround it.