The Principality Stadium roof will remain open for each of Wales ' three home fixtures during the Six Nations as organisers look to limit the spread of the coronavirus.
Capacity crowds will be welcomed back in Cardiff for upcoming games against Scotland, France and Italy, but the Daily Mail reported they will be played as open-air events.
The atmosphere in a closed-roof Principality Stadium is often regarded as one of the most intimidating in Test rugby, though it requires both participating teams or unions to agree to the change in advance.
It's become increasingly rare for visiting outfits to agree for the roof to be closed in Cardiff, with most opponents well aware of the atmosphere the Welsh faithful can generate.
The decision has been taken out of the Welsh Rugby Union's hands on this occasion, however, as the spread of Covid-19 continues to pose a threat to health and safety.
Coronavirus transmission is known to be more effective in enclosed spaces, and professor Chris Whitty, the UK's chief medical officer, has said: "The evidence is very clear that outdoor spaces are safer than indoors."
Fans will also be encouraged to wear face masks in the Principality Stadium's concourse areas, while alcohol will stop being served after half-time in upcoming games.
Those are the latest in a string of changes at the Cardiff venue for this Six Nations championship, with the Principality Stadium also serving weaker beer in an effort to curb drunken incidents.
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Numerous pitch invader incidents occurred during the autumn internationals— one of which denied a try-scoring chance in defeat to South Africa —while there were reports of fans vomiting in stadium seating.
"We just want people to enjoy the game," said head coach Pivac in reference to the new measures. "We can’t have the odd idiot that just spoils it for everyone.
"Get there nice and early and have some fun, but enjoy yourselves in the right way."
Wales kick off the home portion of this Six Nations against Scotland on Saturday, hoping to bring Gregor Townsend's side down to earth following their dramatic first-round win over England.
Finn Russell helped kick the boys in blue to Calcutta Cup victory at Murrayfield, with Scotland presenting a new-and-improved threat as they travel to Cardiff.
Wales, meanwhile, suffered a disappointing 29-7 defeat against Ireland in Dublin, ensuring their Six Nations title defence got off to a glum start.
The Cardiff crowd will be urging Pivac's side to turn the tide and revive their chances of retaining the title with a first win over Scotland, who haven't won in the Welsh capital since April 2002.
