Via AILA.org

On March 1, 2019, USCIS held a teleconference to discuss revised Form I-539 and new Form I-539A. USCIS provided the following updates during the engagement, among others:

• An official copy of the revised Form I-539 and new form I-539A will be published on the USCIS website on March 8, 2019.
• New rollout period:
  • USCIS will continue accepting Form I-539 with an edition date of 12/23/16 until March 21, 2019, as long as it is received by USCIS by that date.
  • USCIS will reject any Form I-539 with an edition date of 12/23/16 that is received by USCIS after March 21, 2019.
  • Starting on March 22, 2019, USCIS will only accept the revised Form I-539 with an edition date of 02/04/19.

This information is currently posted on the I-539 page of the USCIS website.