NGOs and the UN have been pushing for legislative changes in PNG where facilities for disabled people fall short of acceptable standards.
Although PNG has signed on to the UN Convention on the Rights of Persons with Disabilities, it's yet to be ratified.
UN Resident Coordinator to PNG, David McLachlan-Karr, has told Radio Australia's Pacific Beat the government appears to have no aversion to ratifying the convention, so it should be made a priority.
"It's to provide the kind of services to have legislative policies, where people need to create wheelchair accessible buildings, lavatories, to make Braille widely available," he said.
"All of these kind of services which currently not on the books here in PNG, but is certainly something that we believe should be a government priority,"
The UN has declared Monday the International Day of Persons with Disabilities.
Mr McLachlan-Karr says charities and churches, rather than government groups, are responsible for most of the work for people with disabilities in PNG.
He says in countries like PNG there appears to be still a stigma associated with disabilities, and events on Monday are designed to break down that.
"One of the important parts of it is to bring people out of being invisible in society, to bring people together as a support group to show that there are other people who live with disabilities," he said.
"My feeling is that in PNG, it's not something that is talked about as much as it should be, As I said the stigma and keeping people at home - the feeling that these people are almost an invisible marginalised group is still very much there, and should be changed."