WASHINGTON, March 4 (Reuters) - President Donald Trump's

administration is considering granting relief from his 25%

tariffs on Canadian and Mexican imports to products that comply

with the trade pact he negotiated with the two U.S. neighbors

during his first term, Commerce Secretary Howard Lutnick said on

Tuesday.

Two sources familiar with discussions between the Trump

administration and Canadian and Mexican officials said the talks

are aimed at exemptions for companies that comply with the 2020

U.S.-Mexico-Canada Agreement's rules of origin, largely - but

not exclusively - aimed at automakers.

Two automaker sources said one scenario would call for a

30-day exemption from the tariffs, but automakers would have to

demonstrate plans to invest more in U.S. auto production to

remain exempt.

Details of potential changes to the tariffs that took effect

on Tuesday are far from agreed, the sources said. Trump will

decide on any final deal, and since taking office, he has chosen

to impose tariffs when given the option to back off.

The 25% levies on Mexican and Canadian goods create

particular problems for automakers, who face massive cost

increases for parts and vehicles produced in Mexico and Canada

bound for the U.S. market.

An exemption from tariffs for cars and trucks that comply

with USMCA's complex North American content rules for duty-free

access to the U.S. market would be a boon for Detroit automakers

Ford, General Motors ( GM ) and Stellantis ( STLA ).

It also would benefit some foreign brand automakers with

large U.S. production footprints, including Honda ( HMC ) and

Toyota ( TM ), while forcing some competitors assembling cars

in Mexico to pay the full 25% U.S. tariffs.

The deal under consideration would also eliminate the 10%

tariff on Canadian energy imports, such as crude oil and

gasoline, which comply with the USMCA rules of origin, one of

the sources familiar with the talks said.

Lutnick, in an interview on Fox Business, said Trump was

looking at the USMCA as a way to meet Canada and Mexico "in the

middle some way."

"The president is considering giving you relief, if you live

under those rules. And if you haven't lived under those rules,

well, then you have got to pay the tariff," Lutnick said.

He said a potential arrangement could be announced on

Wednesday, but added that Canada and Mexico "have got to do

more" to end fentanyl overdose deaths in the United States, the

rationale Trump has used for the tariffs.

Speaking to reporters after Trump's address to Congress at

the U.S. Capitol, Lutnick said he thought there would be "some

movement" on tariffs on Wednesday.

"It will not eliminate the tariffs, but it might modify the

tariffs somewhat. That's a decision that will come tomorrow,"

Lutnick said.

The move would lift a huge burden from Detroit automakers,

whose vehicles comply with USMCA's complex 75% North American

content rules - requirements agreed by Trump during his first

term to keep parts production in the region.

For full duty-free regional access, the rules also require

40% percent of a passenger car's content to be manufactured in

the United States or Canada, based on a list of "core parts"

including engines, transmissions, body panels and chassis

components. The threshold for pickup trucks is 45%.

Ford, GM and Stellantis ( STLA ) have been pressing Lutnick to exempt

USMCA-compliant vehicles, while the United Auto Workers have

pressed the administration to exempt key auto parts from tariffs

that could slow auto production.

The Detroit Three held a virtual meeting last week with

Lutnick to make the case, two sources briefed on the meeting

said.

Trump, in his congressional address on Tuesday, said he had

spoken to the top executives at the Detroit Three automakers

that day and said tariffs and other policies will result in

higher growth and "allow our auto industry to boom."