移民局的公告在这里：「If You File in a Timely Manner. Nonimmigrants generally do not accrue unlawful presence while the timely-filed, non-frivolous EOS/COS application is pending. Where applicable, employment authorization with the same employer, subject to the same terms and conditions of the prior approval, is automatically extended for up to 240 days after I-94 expiration when an extension of stay request is filed on time.」
A nonimmigrant alien within the class of aliens described in paragraphs (b)(2), (b)(5), (b)(8), (b)(9), (b)(10), (b)(11), (b)(12), (b)(13), (b)(14), (b)(16), (b)(19), (b)(23) and (b)(25) of this section whose status has expired but on whose behalf an application for an extension of stay was timely filed pursuant to § 214.2 or § 214.6 of this chapter. These aliens are authorized to continue employment with the same employer for a period not to exceed 240 days beginning on the date of the expiration of the authorized period of stay. Such authorization shall be subject to any conditions and limitations noted on the initial authorization. However, if the district director or service center director adjudicates the application prior to the expiration of this 240 day period and denies the application for extension of stay, the employment authorization under this paragraph shall automatically terminate upon notification of the denial decision.