That's an interpretation of an IWC opinion letter, which I think is slightly dodgy. The letter refers to an average of one day off a week over the course of a month.
The "intent" - as I read it - was that giving an employee four days off in every four weeks would comply with the law even if it resulted in the employee working more than seven days straight during the month.
As *I* read it, If I give you Monday off this week, then work you 13 days straight and give you a Sunday and Monday off and then again the Sunday after next, I've complied even though you twice worked a 13 day period without a break. Stretching that to say you can work 27 days straight then have four days off would be, well, stretching it.
I can't find any case law though, so unless and until someone refuses to work a 26th consecutive day, gets fired for doing so, and goes to the DLSE with the complaint, it's all just opinion.