USCIS recently published revised Form I-129, Petition for a Nonimmigrant Worker. The revised Form I-129 is labeled with an Oct. 23, 2014, edition date. You can download the revised form and details about who may file Form I-129 from the USCIS forms website.
Starting on May 1, 2015, USCIS will accept only the Oct. 23, 2014, edition of Form I-129. USCIS will not accept previous editions of Forms I-129 (edition dates: Oct. 7, 2011, Jan. 19, 2011, and Nov. 23, 2010) on or after May 1, 2015.