; (ii) the alien’s presence is required by the Government in furtherance of such law enforcement matter; and (iii) the alien is inadmissible, does not satisfy the eligibility requirements for admission as a nonimmigrant, or there is insufficient time for the alien to be admitted through the normal visa process. (F) For purposes of determining an alien's eligibility for parole under subparagraph (A), the term case-by-case basis means that the facts in each individual case are considered and parole is not granted based on membership in a defined class of aliens to be granted parole. The fact that aliens are considered for or granted parole one-by-one and not as a group is not sufficient to establish that the parole decision is made on a case-by-case basis . (G) The Secretary of Homeland Security may not use the parole authority under this paragraph to parole an alien into the United States for any reason or purpose other than those described in subparagraphs (B), (C), (D), and (E). (H) An alien granted parole may not accept employment, except that an alien granted parole pursuant to subparagraph (B) or (C) is authorized to accept employment for the duration of the parole, as evidenced by an employment authorization document issued by the Secretary of Homeland Security. (I) Parole granted after a departure from the United States shall not be regarded as an admission of the alien. An alien granted parole, whether as an initial grant of parole or parole upon reentry into the United States, is not eligible to adjust status to lawful permanent residence or for any other immigration benefit if the immigration status the alien had at the time of departure did not authorize the alien to adjust status or to be eligible for such benefit. (J) (i) Except as provided in clauses (ii) and (iii), parole shall be granted to an alien under this paragraph for the shorter of— (I) a period of sufficient length to accomplish the activity described in subparagraph (D) or (E) for which the alien was granted parole