Covid Passes will now be needed to enter cinemas, theatres and concert halls in Wales from today.
The extension of the pass was approved by members of the Senedd in a vote on November 9 with Labour and Plaid supporting the measures and the Conservatives and Lib Dems opposed.
People already have to show a Covid Pass - showing they're fully vaccinated, had a negative lateral flow test within 48 hours or recently had the virus - to enter nightclubs and attend large events in Wales.
Case rates are high in Wales (478 per 100K) although have come down from over 700 in recent weeks.
Businesses have warned about the economic impact of the passes but supporters say it could help keep businesses open over the winter period.
The guidance on self-isolation has also been changed and people are being encouraged to work from home to help bring the virus under control.
Mark Drakeford has warned the passes could be extended to hospitality.
Deputy Minister for Arts and Sport, Dawn Bowden said: “Cases of coronavirus in Wales are very high at the moment and we all need to work together to bring them under control.
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“Extending the use of the Covid Pass to cinemas, theatres and concert halls is another way we can strengthen the measures we have in place to keep us all safe.
“I understand the challenges this sector has faced during the pandemic – this will help keep these businesses open during the difficult autumn and winter months ahead.
“We want to do everything we can to keep Wales open and to keep Wales safe and to give people the confidence to return to these venues.”
Cinemas, theatres and concert halls are all indoor venues where large numbers of people spend long periods close together.
Health Minister, Eluned Morgan added: “The COVID Pass was introduced just over a month ago for entry to nightclubs and larger indoor and outdoor events. The feedback we have had suggests the system is working well.
“We will continue to work with the sectors introducing the pass to support them.”
Welsh Conservative MS Darren Millar said there was no "clear and credible" evidence that the Covid Pass for clubs and events had worked to stem infections.
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He said they are committed to protecting lives and livelihoods" but did not believe the introduction of "barriers to people's freedoms" was the right thing to do based on the evidence.
He added: "They are coercive, ineffective and anti-business."
He said a cinema association had warned small venues could close, and added that "people's jobs and livelihoods are on the line".