The relevant part is 8 CFR 214.2(h)(4)(iii)(D)(5) ( https://www.law.cornell.edu/cfr/text/8/214.2#h_4_iii_D_5 https://www.law.cornell.edu/cfr/text/8/214.2#h_4_ii

The relevant part is 8 CFR 214.2(h)(4)(iii)(D)(5) ( https://www.law.cornell.edu/cfr/text/8/214.2#h_4_iii_D_5 https://www.law.cornell.edu/cfr/text/8/214.2#h_4_iii_D_5 ) > 5) A determination by the Service that the equivalent of the degree required by the specialty occupation has been acquired through a combination of education, specialized training, and/or work experience in areas related to the specialty and that the alien has achieved recognition of expertise in the specialty occupation as a result of such training and experience. For purposes of determining equivalency to a baccalaureate degree in the specialty, three years of specialized training and/or work experience must be demonstrated for each year of college-level training the alien lacks. For equivalence to an advanced (or Masters) degree, the alien must have a baccalaureate degree followed by at least five years of experience in the specialty