This disfavors local production as compared with imports. Exploitation will be much more difficult and costly. In view of regional experience, gas is more likely than oil. Cambodia is highly donor dependent, and therefore susceptible to pressures in this respect. However, this does not in fact overlap with protected areas.
Multinational companies seek to be good citizens paying taxes and complying with regulations.
This may not be the case with local companies. The key expectation is that the governments for Thailand and Cambodia will sign agreements enabling exploitation of overlapping or disputed territory concessions, but this may take time. This issue therefore needs high priority.