Adelaide's main Anzac Day services will proceed, including the dawn service and a modified version of the traditional march, Premier Steven Marshall says.
Individual RSL branches will also be free to hold their own services.
Mr Marshall says the government has reached out to those organising larger events in the suburbs to offer support to ensure they can proceed.
Some branches had previously moved to cancel events because of difficulties with complying with COVID-19 restrictions.
There were also concerned for the health of older veterans.
"We will make sure that SA Health is working with the RSL sub-branches and we'll offer whatever support that is needed and in some instances that will be additional staff," he said.
"These are our most sacred commemorations, it's our most important day of the year and we want to make sure that as much as possible it can go ahead."
The RSL said it was continuing with preparations for the main services in the centre of the city.
Anzac Day committee chairman Ian Smith said attendance at the main dawn service and march will be limited, access controlled and would require registration online.
Other changes include using bands at particular spots, rather than have them participate in the march.
The crowd for the march will be restricted to former members of the Australian armed forces and their allies, along with their immediate family members
"We appreciate this is a drastic change from the past and this decision has not been made lightly," Mr Smith said in a Facebook post.
He said more details on pre-registration arrangements and how the collection of contact tracing information would work would be provided next week.
Mr Marshall said while most Anzac Day services would again be modified this year, they would be significantly expanded on what was possible in 2020, soon after the coronavirus pandemic emerged.
Most services were cancelled last year.
