PAUT Training Requirements & AWS D1.1

I have a few questions regarding PAUT training and AWS D1.1. I am in the process of creating a PAUT program to supplement our current UTSW program.
I am an ASNT Level III in UT/MT/ AWS CWI and have recently gone through my 80 hours of PA classroom training. I am the only person within my company with "experience" but no documented OJT. It is completely new to our company.
AWS D1.1 and SNT-TC-1A require 320 hours of additional OJT along with practical testing meeting 8.20
As the corporate Level III for my company, do I need someone from outside our company to give and sign off on OJT for myself? Do I need to have someone from outside the company come in and give me a practical?
I am already planning on having an outside Level III with PAUT experience review procedures once they are written but was curious about OJT and practical testing for myself.