Final answer:
Completing 36 Professional Development Units (PDU's) is not a requirement for initial NBCOT certification for an OTR.
Step-by-step explanation:
The correct answer is c. Completing 36 Professional Development Units (PDU's). This is not a requirement for initial NBCOT certification for an Occupational Therapist Registered (OTR). The other options, a master's or doctoral degree in occupational therapy and passing the NBCOT certification exam, are indeed requirements for initial NBCOT certification for an OTR.