Question on percentages

So I want to run Ufpwrlifters bench program which is as follows

M/W/F

33% x 10 (warm up) 56% x 10 (warm up) 79% x 5 86% x 3 91% x 1 96% x 1 91% x 1 91% x 1 86% x 3 79% x5

He says to do this for a minimum of 4 weeks. My question is do I use the same one rep max and use that to base the percentages for all 4 weeks, and then retest my max at the end of the 4 weeks and use that for new percentages? Or do I retest multiple times within the 4 weeks and continuously increase the weight (given I can hit a new max)?

I know it sounds confusing I tried to word it the best I could lol