Employees' working hour as allowed by MOM

Hi, I want to ask what is the maximum working hour per week (or month) as allowed by MOM?

I am required to work 6 days in a week for 9 hours (including break time). I'm also a shift worker, which means I have 2 different working time. I saw in MOM's website that shift worker is only supposed to work for an average of 44 hours for each continuous 3 weeks. For mine:
Week 1: 8 working hours * 6 days= 48 hours/week
The average for 3 weeks would be 48 hours, which exceed the MOM's requirement.

My concern is whether this requirement is true for all cases, or most companies tend to ignore it? Because I want to tell my employer regarding this, since I feel like 9 hours in 6 days is also a bit too much (not to mention my salary). If anyone knows better, can you please explain regarding the maximum working time in singapore?

Thanks!