This is happening first time in NTS .DON'T KNOW the exact story of why they are skipping test for some posts and conducting for other.
A person told me but not confirm that as ministry dictates all its companies (LESCO,PESCO,MEPCO HESCO AND ETC) that they are bound to fill only those posts which they they require the most due to so called PRIVATIZATION.
So may be here they are conducting test for the posts comes first in their priority..NTS hardly given a week in space of candidates lists and test date.