F1's governing body was scheduled to make an official announcement on Friday.
Feb.28 (GMM) A decision about whether a twelfth or even thirteenth team will make its debut in 2015 has been postponed.
With separate applications led by Nascar team co-owner Gene Haas, former HRT chief Colin Kolles and Serbian Zoran Stefanovich believed to have been lodged with the FIA, F1's governing body was scheduled to make an official announcement on Friday.
But Germany's Auto Motor und Sport said on Friday that the announcement has been delayed.
Correspondent Michael Schmidt said the delay is because F1's commercial rights holders, headed by chief executive Bernie Ecclestone, are yet to fully analyse the prospective new teams' projects.
And Formula One Management "has a right of veto", Schmidt said.
"Only when Bernie Ecclestone gives his approval will the applications be accepted," he added.