The Macau government will require migrants from six countries to submit a certificate proving they have no criminal record if they want to work in the city.

Secretary for Security Wong Sio Chak told the legislature on Tuesday that Vietnam would be the first nation to be subject to the new measure next February 1 on a trial basis, Jornal Do Cidadao reported.

The new measure will then expand to workers from five other countries, namely Bangladesh, Nepal, Nigeria, Pakistan and Sri Lanka, but no timeline for implementation was announced for them.

People from the six counties who want to apply for a work permit, known as a non-resident worker’s card or “blue card,” will need to submit a certificate of criminal record.

Wong said the new measure was meant to respond to the requirements of public security, migration controls and the labor market.

As at October, there were 176,000 migrant workers in Macau from at least 18 countries, Jornal Cheng Pou reported, adding that 14,731 workers were from Vietnam.