observant

adj.

[1]	watchful , alert , attentive , vigilant , on the lookout , on the qui vive , on guard , wide awake , regardful , mindful , aware , keen , keen-eyed , sharp-eyed , eagle-eyed , perceptive , sharp , shrewd
[2]	observant of , observing , obedient (to) , compliant (with) , respectful (of) , heedful(of) , attentive (to/of) , conformist (to) , adherent (to)
[3]	law-abiding