An applicant for certification in a specialty in geophysics shall meet all of the requirements of Section 7841.1 and in addition, his seven years of professional geophysical work shall include one of the following:
(a) A minimum of three years performed under the supervision of a geophysicist, certified in the specialty for which he is seeking certification.
(b) A minimum of five years’ experience in responsible charge of professional geophysical work in the specialty for which the applicant is seeking certification.