Weekly rest breaks?

Meant 9 hours lol
Well the person who told me what I can do himself is being a very naughty boy but what you guys are saying and I’ve been misinformed.

So quick summary,

I can do max 3 15 HR shifts and 3 13 HR shifts in 1 week bearing in mind 2nd week I must have a 45 hour rest in there?

I can reduce my rest to 9 hours 3 times in any given week maximum and all the rest will have to be 11 hours rest e.g if I finish work at 06:00 I can’t return now until 17:00?

However if I have a 24 hour rest in the middle of the week my 3 reduced rests now reset?

And during a during if I’m having a 3 hour break, I can now reduce my rest to 9 hours again?

Hopefully it’s cracked and I understand it lol