Not as I understand it. Its only from this year, and is legal under WHS, but fundamentally reveals, that like EG valuing competition scores more highly than GP ones for its competitions, Ireland doesnt trust handicaps for entry to its either and so is applying a reduction to handicaps according to previous results in those competitions, to determine entry eligibility now. Mauritius just went too offline, and so are pausing their rule until, presumably, the R&A legalises it or solves the problem of GP scores some other way that also satisfies Mauritius but legalises it for everyone.If I understand correctly then Golf Ireland have gone rogue for years, through the use of low HIs rather than HIs for inter club matches.
So clubs doing their own little fixes. Country associations doing their own thing. For a one world system, it doesnt give an image of buy-in and trust in WHS.