National Park is under jurisdiction of Wildlife Department, Malaysia. In Taman Negara, the Wildlife HQ is located at the main entrance to the park within Mutiara Taman Negara Resort.
You can register and get the entrance permit at the counter. Your entrance permit is RM1.00 per person. If you are bringing camera and smart phone, you need to apply for license, which it cost you RM5.00 per camera or smart phone.
It is open 7 days a week or 365 days a year, from 8:00am to 5:00pm. Ask wildlife staff or find some on exhibited materials if you need more information. Enjoy your exploration.