Under the state of emergency, restrictions on who and what can be taken in and out of "resource project areas" have been put in place, the Australian Broadcasting Corporation's Pacific Beat reported.
They include requirements for authorisation to move people and assets into mine sites, and a ban on gatherings of more than five people near them.
The new restrictions were put in place this week even though other preventative measures have been lifted, such as the ban on children going to school.
They have also come amid the ongoing conflict between the PNG government and the operator of the Porgera gold mine, Barrick Niugini, after the government last month refused to renew Barrick's special mining lease.
One resource industry insider who wanted to remain anonymous told Pacific Beat the new restrictions were aimed at increasing pressure on Barrick as it challenges the refusal in court.
Emergency controller David Manning told ABC Radio Australia's Wantok program the restrictions covered all mine sites and the Porgera mine was not being targeted.
Australian mining company Newcrest said it did not expect the restrictions to affect operations at its Lihir gold mine in New Ireland province.
Ok Tedi Mining said it had already sought approval for charter flights and passenger manifests for flights to and from its mine in the Star Mountains in Western Province.