Srisuwan Janya, secretary-general of the Association for the Protection of the Thai Constitution, submitted the complaint to the NACC.

Srisuwan said the EC’s actions while managing the referendum may have violated the 2004 interim charter and the 2016 Referendum Act.

The petition said the EC printed only 1 million copies of the draft charter, failing to sufficiently distribute the charter draft to every household to reach the 50 million eligible voters, violating the interim charter and the Referendum Act, which stipulates that the EC must “fairly” manage the referendum.

The EC also allowed the government and the National Council for Peace and Order to block charter draft opponents from voicing their viewpoints and threatened to arrest them, but allowed draft supporters to freely express their opinions, the petition alleged.

The complaint also said the EC quickly announced unofficial results even though there were irregularities at some polling stations.

The EC also allegedly failed to properly design ballots because one ballot was used for two questions, confusing voters, Srisuwan’s petition stated.

Last, the new ballot boxes were made of plastic and were broken during strength tests, proving that the containers were not durable as required by the EC regulations, the petition stated.

Srisuwan said the NACC must take legal action and seek impeachment proceedings against EC members if it finds grounds to the accusations, adding the Constitutional Court should then nullify the referendum result and organise a new referendum.