4. If an H-1 or L-1 nonimmigrant has traveled abroad and reentered the United States via advance parole, the alien is accordingly in parole status. How does the interim rule affect that alien's employment authorization?
请问问题4中的下面的这句话如何理解：“had the alien not left and returned under advance parole”。 曾经在一个老印的坛子中读到意思是第二次用AP入境后必须用EAD工作。当时觉得很无稽，但现在阅读这句话就觉得确实是这个意思。因为从第一次使用AP后每次出境和入境时都将处于同样的AP身份了。
请确认这种理解是否正确。如果错误的话，到底应该怎末理解? Thanks.
A Service memorandum dated August 5, 1997, stated that an "adjustment applicant's otherwise valid and unexpired nonimmigrant employment authorization ...is not terminated by his or her temporary departure from the United States, if prior to such departure the applicant obtained advance parole in accordance with 8 CFR 245.2(a)(4)(ii)." The Service intends to clarify this issue in the final rule. Until then, if the alien's H-1 or L-1 employment authorization would not have expired, had the alien not left and returned under advance parole, the Service will not consider a paroled adjustment applicant's failure to obtain a separate employment authorization document to mean that the paroled adjustment applicant engaged in unauthorized employment by working for the H-1 or L-1 employer between the date of his or her parole and the date to be specified in the final rule.