老郝整理的以下信息对你应该有帮助：
From Oh Law:
04/22/2014: Nebraska Service Center "Practice" on Downgrading EB-2 to EB-3
and Upgrading EB-3 Back to EB-2 When Visa Cut-Off Dates Change Between EB-2
and EB-3
According to the AILA-USCIS Stakeholder meeting minutes of 03/13/2014,
employers can file EB-2 and EB-3 I-140 petitions concurrently with two
complete sets of petitions. Besides, employers can downgrade EB-2 to EB-3
with or without transfer of the pending EB-485 applications from EB-2 to EB-
3. More importantly, it indicates that the employers can request move back
and forth between the EB-2 and EB-3 for the pending EB-485 applications.
Caveats: It is a conference memo and NSC's "practice point," and neither law
nor rule nor USCIS HQ policy. Besides, there are delicate practice points
to follow and achieve such downgrading or upgrading and people should work
with their legal counsels to achieve the purposes without any "potential
risk or mishaps." Never try it on your own! Never even think about doing it
by yourself! Another caveat: There is no confirmation from the Texas Service
Center as to its "practice" on these points. Never assume nor guess!
祝你好运。
