Non-imm B Requirements

Here is another question for the experts. On the Thai Embassy's website (KL), it states that "Applicants becoming teachers at any educational organizations (national, public and private) in Thailand are required to submit documents evidence of education, no criminal records in English and a teaching license. Moreover, applicants for private school's teacher are required to submit a letter from Ministry of Education in Thailand." It further states that the Non-Imm B applicant should bring various registration documents regarding the company. My first question is whether university teachers need to fulfill all these requirements. Second, I am curious whether these registration document requirements apply to public Thai universities.

Thank you again for helping the Newbie.