20 C.F.R. § 656.30 : Employees' Benefits — EMPLOYMENT AND TRAINING ADMINISTRATION, DEPARTMENT OF LABOR — LABOR CERTIFICATION PROCESS FOR PERMANENT EMPLOYMENT OF ALIENS IN THE UNITED STATES — LABOR CERTIFICATION PROCESS — Validity of and invalidation of labor certifications

(a) Priority date.
(1) The filing date for a Schedule A occupation or sheepherders is the date the application was dated by the Immigration Officer.
(2) The filing date, established under §656.17(c), of an approved labor certification may be used as a priority date by the Department of Homeland Security and the Department of State, as appropriate.
(b) Expiration of labor certifications. For certifications resulting from applications filed under this part and 20 CFR part 656 in effect prior to March 28, 2005, the following applies:
(1) An approved permanent labor certification granted on or after July 16, 2007 expires if not filed in support of a Form I-140 petition with the Department of Homeland Security within 180 calendar days of the date the Department of Labor granted the certification.
(2) An approved permanent labor certification granted before July 16, 2007 expires if not filed in support of a Form I-140 petition with the Department of Homeland Security within 180 calendar days of July 16, 2007.
(c) Scope of validity. For certifications resulting from applications filed under this part or 20 CFR part 656 in effect prior to March 28, 2005, the following applies:
(1) A permanent labor certification for a Schedule A occupation or sheepherders is valid only for the occupation set forth on the Application for Alien Employment Certification (Form ETA 750) or the Application for Permanent Employment Certification (Form ETA 9089) and only for the alien named on the original application, unless a substitution was approved prior to July 16, 2007. The certification is valid throughout the United States unless the certification contains a geographic limitation.
(2) A permanent labor certification involving a specific job offer is valid only for the particular job opportunity, the alien named on the original application (unless a substitution was approved prior to July 16, 2007), and the area of intended employment stated on the Application for Alien Employment Certification (Form ETA 750) or the Application for Permanent Employment Certification (Form ETA 9089).
(d) Invalidation of labor certifications. After issuance, a labor certification may be revoked by ETA using the procedures described in §656.32. Additionally, after issuance, a labor certification is subject to invalidation by the DHS or by a Consul of the Department of State upon a determination, made in accordance with those agencies' procedures or by a court, of fraud or willful misrepresentation of a material fact involving the labor certification application. If evidence of such fraud or willful misrepresentation becomes known to the CO or to the Chief, Division of Foreign Labor Certification, the CO, or the Chief of the Division of Foreign Labor Certification, as appropriate, shall notify in writing the DHS or Department of State, as appropriate. A copy of the notification must be sent to the regional or national office, as appropriate, of the Department of Labor's Office of Inspector General.
(e) Duplicate labor certifications.
(1) The Certifying Officer shall issue a duplicate labor certification at the written request of a Consular or Immigration Officer. The Certifying Officer shall issue such duplicate labor certifications only to the Consular or Immigration Officer who initiated the request.
(2) The Certifying Officer shall issue a duplicate labor certification to a Consular or Immigration Officer at the written request of an alien, employer, or an alien's or employer's attorney/agent. Such request for a duplicate labor certification must be addressed to the Certifying Officer who issued the labor certification; must include documentary evidence from a Consular or Immigration Officer that a visa application or visa petition, as appropriate, has been filed; and must include a Consular Office or DHS tracking number.
(3) A duplicate labor certification shall be issued by the Certifying Officer with the same filing and expiration dates, as described in paragraphs (a) and (b) of this section, as the original approved labor certification.

20 C.F.R. §656.30

69 FR 77386, 12/27/2004, as amended at 72 FR 27946, 5/17/2007