If you are traveling to Papua New Guinea with Canadian passport in most cases you do not need to obtain entry visa to Papua New Guinea at the consulate beforehand. The period of stay though may be limited by the laws of Papua New Guinea. You may check what is the allowed period of stay at the Papua New Guinea consulate in Canada. All other applicants should check information on Papua New Guinea visa requirements, procedure, application forms, fees and processing timings may be found here: https://papua-new-guinea.visacenter.ca/.