Mr Somchai, who is in charge of electoral management, was commenting on the problem of the 28 southern constituencies where there were no candidates in the Feb 2 election.
He said the EC had asked the government to issued a royal decree on a new election day for these constituencies.
Mr Somchai insisted the EC did not have the authority to schedule a new election day and believed the government was legally empowered to do so.
He said the government would have to make a decision on the issue, adding that he did not know whether scheduling a new election day in the 28 constituencies would contravene Section 108 of the constitution.
"The EC can only hold a new election in constituencies where voters were blocked from casting ballots on Feb 2. Initially, the EC believes this can be done in seven provinces."
However, the EC would not hold a new election of MPs during the month of March for fear it could cause confusion and problems because an election of senators has been initially scheduled for March 30, Mr Somchai said.