22 CFR § 40.51 - Labor certification.
(a) INA 212(a)(5) applicable only to certain immigrant aliens. INA 212(a)(5)(A) applies only to immigrant aliens described in INA 203(b)(2) or (3) who are seeking to enter the United States for the purpose of engaging in gainful employment.
(b) Determination of need for alien's labor skills. An alien within one of the classes to which INA 212(a)(5) applies as described in § 40.51(a) who seeks to enter the United States for the purpose of engaging in gainful employment, shall be ineligible under INA 212(a)(5)(A) to receive a visa unless the Secretary of Labor has certified to the Secretary of Homeland Security and the Secretary of State, that
(1) There are not sufficient workers in the United States who are able, willing, qualified, (or equally qualified in the case of aliens who are members of the teaching profession or who have exceptional ability in the sciences or the arts) and available at the time of application for a visa and at the place to which the alien is destined to perform such skilled or unskilled labor, and
(2) The employment of such alien will not adversely affect the wages and working conditions of the workers in the United States similarly employed.
(c) Labor certification not required in certain cases. A spouse or child accompanying or following to join an alien spouse or parent who is a beneficiary of a petition approved pursuant to INA 203(b)(2) or (3) is not considered to be within the purview of INA 212(a)(5).