We are in an OCONUS location where the culture and environment sees cigarette smoking as something of an accepted pass-time! Outside the wire its deemed as OK to smoke in restaurants, public buildings, public transportation, almost anywhere! However, the recent emphasis here being placed on stopping/minimizing tobacco use on military installations is kicking up some dust (primarily from ktr's employees working on the installation). Military folks and DoD civilians pretty much stay in step with the new anti-smoking pressure (they do grouse about it, but they do comply), while quite a few ktr's folks (particularly construction crews and some service staff) are NOT so keen to comply. Some even flaunt the rule by smoking directly in front of huge "No Smoking" signs! (Most do not speak much English, let alone read it; which is excuse #1). Several ktr personnel have been repeatedly 'advised' of the designated smoking areas but continue to smoke in other than DTAs. We have tried speaking to them and have issued several written notices but they continue unabated. What recourse/actions may be available for us to realign these ktrs (and their personnel) with the DTA rules? (Note: Nothing in the contract addresses this specific issue.)