Some of the KBL candidates with pending cases of disqualification against them invoke P.D. 1667 decreed on January 26,1980 amending section 1 of P.D. 1661 by inserting the proviso that a person who participated as an officer in the campaign of a political party, group or aggrupation in the immediately preceding elections shall be deemed a member of such party as of the date of the political campa