On February 28, 2019, the Office of the Citizenship and Immigration Services (CIS) Ombudsman released an announcement reminding stakeholders that USCIS will publish on its website and only accept revised Form I-539 and Form I-539A (edition date 02/04/19) starting March 11, 2019. The CIS Ombudsman also shared with the public copies of the unofficial versions of the revised Form I-539 and Form I-539A so that the public can review the anticipated changes. USCIS plans to publish the revised forms on the USCIS website on March 11, 2019.
Source: AILA Doc. No. 19021234.