Not, so have I been told.
One of the guys I work woth got promoted to SGT in his secondary zone. One of my NCOs went to the board because he was in his SZ for SSG.
You can get promoted currently wothout BLC or even ALC due to COVID measures for promotion still being in place, BUT, you can meet the secondary zone, go to the board, pass, go to BLC and then boom, once you get points, which SZ points are often higher then PZ, you get the rank of SGT.
Same for SSG.
Bintananth, this is my literal life. Stop acting like you know it better then me