A Different Pair of Tzitzis

The above only applies if one puts back on the same pair of tzitzis, if, however, one puts on a different pair of tzitzis, then certainly a new berachah would be required.

This is very common on erev Shabbos where people change clothes for Shabbos, and often have a special pair of tzitzis for Shabbos. In such a case a new berachah must be recited.

(Based on Shlomim MeTzion pages 549 – 550)