An applicant otherwise qualified must be admitted to registration as a professional soil classifier if he has fifteen or more semester hours of approved soil courses as recognized by the department, has successfully passed an examination in the principles and practice of soil classifying as prescribed by the department, has completed two or more years of training under the supervision of a registered soil classifier or someone who meets the minimum academic and experience requirements of a registered soil classifier, and has one of the following additional qualifications:

1. (a) is a person who has earned a bachelor's degree or equivalent in a curriculum approved by the department and with a specific record of two years or more of experience of a grade and character which indicates to the department that the applicant is competent to practice soil classifying; or
2. (b) is a person who has earned a bachelor's degree or equivalent in one of the natural sciences and has six years or more of experience in soil classifying work of a character and grade which indicates to the department that the applicant is competent to practice soil classifying; or
3. (c) is a person who holds a valid soil-classifier-in-training certificate with a specific record of two years or more experience as a soil-classifier-in-training of a grade and character which indicates to the department that the applicant is competent to practice soil classifying; or
4. (d) is a person who is an extension specialist, researcher, or teacher of soils in a college or university and has two or more years of soil classifying experience of a character and grade which indicates to the department that the applicant is competent to practice soil classifying.