USCIS resumed premium processing on Tuesday, Feb. 19, for all H-1B petitions filed on or before Dec. 21, 2018. If you received a transfer notice for a pending H-1B petition, and you are requesting premium processing service, you must submit the premium processing request to the service center now handling the petition. You should also include a copy of the transfer notice with your premium processing request to avoid possible delays associated with the receipt of your premium processing request. Additionally, if you received a request for evidence (RFE) for a pending petition, you should also include the RFE response with the premium processing request. If your petition was transferred and you send your premium processing request to the wrong center, USCIS will forward it to the petition’s current location. However, the premium processing clock will not start until the premium processing request has been received at the correct center.
When an H-1B petitioner properly requests the agency’s premium processing service, USCIS guarantees a 15-day processing time.
Source: AILA Doc. No. 19021544.