Junk food adverts are being banned on council property in a bid to make the city healthier.
The policy, green-lit by Cardiff council on Friday, is focused on sustainability and promoting healthy food and drink.
It also bans ads for petrol and diesel vehicles, pay-day loans, tobacco and vapes.
Alcohol and religious advertising is subject to strict controls and must comply with national standards.
Cardiff council will become the second local authority in Wales to implement the ban after the Vale of Glamorgan which did so earlier this month.
According to the council it has limited adverts for food and drink high in fat, salt, and sugar (HFSS), in line with Welsh government policy.
It said the ban was complemented by broader measures to ensure adverts were ethical, transparent, and in line with authority values.
From March 2026, new obesity-tackling regulations set by the Senedd will restrict where shops and websites can display foods high in sugar, fat, and salt.
It means junk foods including pizza, chocolate, and cereal will have to be removed from shop entrances and the end of aisles, while sugary drink refills and some buy-one-get-one-free deals will also end.
The restrictions are aimed at stopping impulse buys at key selling spots in businesses with 50 or more employees, with shops found breaching them to face a fine.
At the time Health Secretary Jeremy Miles said it would help “tackle Wales’ growing obesity problem”.
The council’s cabinet member for climate change, Dan De’Ath, said: “This is about putting the health and wellbeing of Cardiff’s people first.
“Products – such as foods high in fat, salt, and sugar – can still be advertised elsewhere in the city, and people can still make their own choices on whether to buy them or not.
“But stopping publicly owned assets being used to promote them is a positive step towards creating a stronger, fairer, and greener city for everyone.”
The policy will be reviewed every three years and existing contracts will be honoured until their expiry.
