In a media conference, La'auli said he received a letter from the speaker informing him that his verbal resignation in Parliament last Tuesday is final.
But the MP told reporters he will wait and see if a by-election will be called.
He said he is willing to run to prove his constituency is behind him with their full support.
Meanwhile the MP said he is now accepting the call from his Gagaifomauga number 3 constituency to establish a new political party.
