Indonesia has pledged to respect international law as Singapore investigates companies and individuals linked to the 2015 land and forest fires that enshrouded the region in toxic haze.
"Both Singapore and Indonesia have regulations (regarding forest fires). We respect our mutual agreement, which is based on international law," Coordinating Maritime Affairs and Investment Minister Luhut Pandjaitan said in a statement last Wednesday.
Mr Luhut, tasked by President Joko Widodo to coordinate efforts in fighting forest and plantation fires, was speaking at a virtual meeting with ministers, as the country prepares for the peak of the dry season in August and September.
Transboundary haze pollution from Indonesian forest fires has affected its neighbouring countries, especially Malaysia and Singapore, for around two decades.
Haze pollution between June and October 2015 was one of the worst on record.
In 2015, under Singapore's Transboundary Haze Pollution Act (THPA), the National Environment Agency (NEA) launched an investigation into four Indonesian companies, Bumi Andalas Permai, Bumi Mekar Hijau, Sebangun Bumi Andalas Woods Industries and Rimba Hutani Mas.
The Act targets those responsible for causing or condoning fires, if the burning results in unhealthy levels of haze in Singapore.
A Pollutant Standards Index of 101 or greater for 24 hours or more is defined as unhealthy in the Republic.
An NEA spokesman, in an e-mail to The Straits Times last Saturday, said that the investigations under the THPA are ongoing.
Mr Luhut said Indonesia will also adhere to the Asean Agreement on Transboundary Haze Pollution, a pact to combat the regional smog which it ratified in September 2014, the last of 10 countries to do so.
While Indonesia is committed to working together with Singapore in controlling land and forest fires and the spread of haze across national borders, Mr Luhut said, any efforts undertaken must not compromise his country's national sovereignty.
"We are obligated to defend Indonesian nationals, but we also enforce laws on them if they are found guilty," the minister said.
This means that "any verdict or sanction on Indonesian parties issued by foreign courts and governments will not be automatically executable in Indonesia", ministry spokesman Jodi Mahardi told ST last Thursday.
"However, Indonesia will also use its environment and forestry laws to enforce against (errant companies) if they are found to breach the laws," he added.
According to the NEA spokesman, Singapore's THPA (2014) was enacted to complement the efforts of other countries to hold companies, including Singapore and non-Singapore entities, to account for causing or contributing to haze pollution in Singapore.
"It is not directed at any entity based on nationality and is consistent with international law," the spokesman added.
"The THPA also does not replace the laws and enforcement actions of other countries, and adds to the collective efforts to hold errant companies accountable for their actions."
Indonesia has been carrying out cloud-seeding operations to induce rain in regions prone to forest fires until the dry season ends in September.
In late March, the country's Meteorology, Climatology and Geophysics Agency forecast a "wetter" dry season this year compared with last year for most of Indonesia.
