Cambodia
Cambodia allows only incidental use of public works, but Angkor is far out of copyright, so the real constraint there is the site authority's rules.
Guidance, not legal advice
Permit
Conditional
Issuer: Apsara National Authority for commercial work at Angkor; no permit for personal photography
Cost: No permit for personal photography; commercial photo or video at Angkor needs Apsara permission and fees, plus a valid Angkor pass
Personal photography needs no permit. Tripods and professional gear at Angkor need Apsara permission. Avoid military sites.
Drone / airspace
Regulated by the State Secretariat of Civil Aviation; tightly controlled and permit-only over Angkor and heritage areas
For category detail, see Drone Authority.
Street / public space
Yes, generally accepted; be respectful of monks and religious settings
Get consent for commercial publication of identifiable individuals.
Freedom of panorama
Limited
Copyright Law (2003) Article 25 allows reproducing a work permanently in public only when it is not the principal subject. Angkor-era monuments are far out of copyright, so the constraint there is site rules, not copyright.
Practical notes
- Angkor allows free non-commercial photos; tripods and commercial gear need an Apsara permit and fee.
- Modern copyrighted public art or buildings cannot be sold as the main subject, even though the ancient temples can be.
Sources
Keep shooting
Knowing the rules is half the job. The craft side: