TN visa - working several part-time jobs

Quote: (ii) Documentation demonstrating engagement in business activities at a professional level and demonstrating professional qualifications. The applicant must present documentation sufficient to satisfy the consular officer (in the case of a Mexican citizen) or the Department officer (in the case of a Canadian citizen) that the applicant is seeking entry to the United States to engage in business activities for a United States employer(s) or entity(ies) at a professional level, and that the applicant meets the criteria to perform at such a professional level. This documentation may be in the form of a letter from the prospective employer(s) in the United States or from the foreign employer, and must be supported by diplomas, degrees or membership in a professional organization. Degrees received by the applicant from an educational institution not located within Canada, Mexico, or the United States must be accompanied by an evaluation by a reliable credentials evaluation service which specializes in evaluating foreign educational credentials. The documentation shall fully affirm:

(A) The Appendix 1603.D.1 profession of the applicant;

(B) A description of the professional activities, including a brief summary of daily job duties, if appropriate, in which the applicant will engage in for the United States employer/entity;

(C) The anticipated length of stay;

(D The educational qualifications or appropriate credentials which demonstrate that the Canadian or Mexican citizen has professional level status; and

(E) The arrangements for remuneration for services to be rendered.