The Liberal Party is standing firm but Labor and the Greens have responded to demands in South Australia to remove prematurely erected federal election signs.

According to the state's Local Government Association (LGA), the signs cannot go up until 5:30pm on Monday after the writs are issued.

Fines of $175 per sign per day can be issued to non-compliant parties.

Liberal member for Mayo Jamie Briggs told 891 ABC Adelaide's Breakfast program that his signs would not be coming down.

Loading...

"We don't agree that ours have been up too early," Mr Briggs said.

"I think what this is is that there were some who weren't prepared for an election to be called and they're not happy they have missed out."

While Labor member for Port Adelaide Mark Butler said half of his party's posters had come down already.

"It will take a bit of time to get all of ours down," he added.

Greens senator Sarah Hanson-Young said the party's volunteers had been informed of the rules and would remove all signs as instructed.

Signs are illegal: LGA

Local councils instructed political parties in South Australia to remove campaign posters on Monday.

Many were seen being placed on poles on Saturday, a day before the election was called by the Prime Minister.

Loading

LGA chief executive Matt Pinnegar told 891 ABC Adelaide's Afternoons host Sonya Feldhoff on Monday the posters were illegal.

"The signs can't go up until the writs have been issued," he said.

Mr Pinnegar said the LGA had advised all councils to write to political parties and request removal.

"We have to abide by the legislation in the Local Government Act," he said.

"If the parties don't remove them within 24 hours then councils have the rights to remove the signs themselves.

"They also have the ability to fine the political parties."