With in the Air Force's enlisted classification coding system:
1 represents the Operations Career Group
1Z represents the new never previously existing Special Warfare Career Field
1ZX represents the career field subdivision.
1ZXX represents a careeerfield sub division (not a shred out of a specific AFSC code).
1ZXXX identifies award of 1, 3, 5, 7, or 9 skill level the of a specific 5 digit specific AFSC code.
1ZXXX is the basic 5 digit code of a specific AFSC.
A shred out of a specific AFSC is added as a suffix of the basic 5 digit code. This is not what is happening. Each enlisted specialty (PJ, CCT, SR, TACP) is retaining a specific AFSC code and job descriptions.