MEP David Casa is to be a candidate on the sixth district, the Qormi-Luqa-Siggiewi district contested by John Dalli at the last general election.
Mr Casa had previously announced he would be a candidate on the fifth district.
Mr Dalli got 3,371 first count votes in the sixth district in the last election, the highest of any of the PN candidates and 1,000 votes more than the second PN candidate, who was Clyde Puli