I understand the reasons for these regs but unless there is more detail that's not referred to in that link this has the potential to cause lots of problems problems in interpretation:
• No player will play more than 180 minutes if selected in a matchday 23 on three occasions in a week
• No player will start all three games in a week
What if a a player in week 3 is on the bench with the intention of playing, say, 40 minutes and he's already on 140 minutes but is needed as a sub after 2 minutes? Do they replace him at the 180 minute mark? What if he's the specialist cover in the front row and there's no other specialist, does that mean they have to go to uncontested scrums?
What defines a week? Are games Sunday, Wednesday, Sunday 3 games in a week, technically I don't think so but I think that is the spirit.
I haven't checked the fixture calendar and that situation might not occur, but that's not the point. We all know that the devil is in the detail and when it comes to a crunch situation at the end of the season with a team vying for top4 or 6 the temptation will be to look may look to finesse* the regulations, which will lead to more bitterness between clubs.
I hope I'm wrong, but as anyone who's been involved in contract disputes will know, hoping that the contract won't be needed is a fools errand.
* I'm being polite, some would say game