大学的RESEARCH绿卡要TENURE/T TRACK？

今天从大学的来信，谈到

... ... recent changes in the interpretation of the permanency of employment of academic professional appointments by the United States Citizenship and Immigration Service (USCIS) with regard to employment-based immigrant petitions ("green card" applications).

The USCIS has made the determination that "permanent" employment is defined as tenure or tenure-track with respect to Research appointments ... ...

真的？假的？