McLaren will be allowed to make chassis changes in 2021 to accommodate the switch from Renault engines to Mercedes even though the sport has decided to keep this year's cars for another season.
The Woking-based team are the only ones undergoing a change of engine provider at the end of 2020.
Formula One announced this month that it was postponing until 2022 planned major rules changes for 2021 "due to the currently volatile financial situation" caused by the coronavirus.
Teams will therefore continue to use their 2020 cars in 2021 as a cost saving measure.
"This decision does not impact our change to Mercedes power units in 2021, and we will be allowed to make the necessary changes to our car to accommodate this," McLaren team principal Andreas Seidl said on the team website (www.mclaren.com)
The coronavirus pandemic has so far forced the sport to cancel this month's Australian season-opener and Monaco showcase while six other races have been postponed.
Formula One chairman Chase Carey said on Monday he still hoped to start a reduced 15-18 race season in the summer.
(Reporting by Alan Baldwin, editing by Ken Ferris)
