To qualify as an equivalent position and experience under the provisions of section 72(1) of the General Business Law, an applicant for licensure as a watch, guard or patrol agency shall have performed services as described in article 7-A, section 89-f(6). Such services shall have been performed for a period of two years for an employer, firm, organization or governmental agency, whether subject to the provisions of article 7 of the General Business Law or otherwise, which required such services in the course of its regular operations, on a full-time basis, in a position, the primary duties of which were the performance of such services and same comprised the major portion of the applicant's activities therein; an applicant may substitute two years' experience supervising and reviewing the work of at least three persons performing such services obtained in a position with such an employer, firm, organization or governmental agency, the primary duties and activities of which were such guard supervision and review.