Human Rights Watch has became the latest group to condemn a wide-ranging proposed law in Cambodia that would regulate how women can dress, among other things.
In a statement, the group's deputy Asia director Phil Robertson called the draft bill an "appalling violation" of women's rights.
The draft Law on Public Order would introduce wide-ranging new rules for multiple aspects of public and private life and behaviour in Cambodia.
The government says it aims to create a "civilised and modern state," and that the draft law would help do this, a ministry official told Voice of America.
It seeks to regulate public spaces and behaviour, from prohibiting roadside vendors and criminalising begging to vague clauses about preserving "national traditions" and "people's dignity".
However, it is elements of the law that would ban women from wearing clothes deemed "too short" or "see-through" that have attracted the most condemnation.
Human Rights Watch joins 36 NGO signatories to a letter demanding the government scrap the legislation.
Robertson said that if passed the law would contravene several of the government's own policies protecting women's rights and individual liberties.
"This draft Public Order Law reveals a dark government vision of rigid, rights abusing social controls against the Cambodian people," he said.