20 CFR § 655.166 - Requests for determinations based on nonavailability of U.S. workers.
(a) Standards for requests. If a temporary labor certification has been partially granted or denied based on the CO's determination that able, willing, available, eligible, and qualified U.S. workers are available, and, on or after 30 calendar days before the date of need, some or all of those U.S. workers are, in fact, no longer able, willing, eligible, qualified, or available, the employer may request a new temporary labor certification determination from the CO. Prior to making a new determination the CO will promptly ascertain (which may be through the SWA or other sources of information on U.S. worker availability) whether specific able, willing, eligible and qualified replacement U.S. workers are available or can be reasonably expected to be present at the employer's establishment within 72 hours from the date the employer's request was received. The CO will expeditiously, but in no case later than 72 hours after the time a complete request (including the signed statement included in paragraph (b) of this section) is received, make a determination on the request. An employer may appeal a denial of such a determination in accordance with the procedures contained in § 655.171.
(b) Unavailability of U.S. workers. The employer's request for a new determination must be made directly to the CO by telephone or electronic mail, and must be confirmed by the employer in writing as required by this paragraph. If the employer telephonically or via electronic mail requests the new determination by asserting solely that U.S. workers have become unavailable, the employer must submit to the CO a signed statement confirming such assertion. If such signed statement is not received by the CO within 72 hours of the CO's receipt of the request for a new determination, the CO will deny the request.
(c) Notification of determination. If the CO determines that U.S. workers have become unavailable and cannot identify sufficient available U.S. workers who are able, willing, eligible, and qualified or who are likely to become available, the CO will grant the employer's request for a new determination. However, this does not preclude an employer from submitting subsequent requests for new determinations, if warranted, based on subsequent facts concerning purported nonavailability of U.S. workers or referred workers not being eligible workers or not able, willing, or qualified because of lawful job-related reasons.