NASM’s Personal Trainer Certification (NASM-CPT) is a certification, which means you must recertify every two years.
On the contrary, the Performance Enhancement Specialization (NASM-PES) and Youth Exercise Specialization (NASM-YES) are specializations, not certifications, which means they do not need to be renewed. Once you pass your PES and YES final exams, your NASM-PES and NASM-YES specialization certificates never expire.