I depends on which code you are working to. For example, if you are writing a MPI procedure to ASME Section V, you can find the "Written Procedure Requiremens" in Article 7. I believe it's in Paragraph T-721. That will tell you everything that must be addressed in your procedure. Most codes have tat or refer you to one that does. PPE is not usually a requiement for NDT unless it is stipulated by your customer.