What is mean AC21?

[zidan]

Hello
Can some body tell me please what is mean AC21?
Thank you

[immihelp]

Read https://www.immihelp.com/changing-em...tatus-pending/

[txh1b]

From the Foreign Affairs Manual http://www.state.gov/documents/organization/87863.pdf

9 FAM 42.53 N3.6 Subsequent Petition in Employment-based Classifications
(CT:VISA-1128; 12-03-2008)

a. Unless revoked pursuant to 8 CFR 205.2 for fraud or misrepresentation, a
priority date accorded by approval of an employment-based first, second, or third preference petition is retained by the beneficiary for any other first, second, or third preference petition approved subsequently for the same beneficiary. In all cases, the beneficiary of multiple petitions is entitled to the earliest of the filing dates of the various petitions.
b. Subsequent petitions need not be from the same petitioner or for the same type of employment. However, where the applicant is no longer proceeding to work for the first petitioner, it would be reasonable to make inquiries to determine whether the first petition had been revoked. (See 9 FAM 42.53 Exhibit II, 8 CFR 204.5e.)
c. A priority date established in the employment-based first, second, or third preference category is not transferable to employment-based fourth or fifth preference petitions or to a family-sponsored petition.