Lal Thanhawla, also state Congress chief, is contesting from two constituencies -Serchhip, his home turf, and neighbouring Hrangturzo - and opposition MNF chief Zoramthanga is trying his electoral fortunes from Tuipui East, bordering Myanmar.
The Mizoram poll was earlier scheduled for Dec 4 and the counting of votes was scheduled for Dec 8.
But the ECI rescheduled the dates following the request of the church and the local political parties to allow the voters to go to church Sunday and to celebrate a local festival.
During the last assembly elections of December 2008, the Congress won 32 seats, the MNF three and the MDF one. The MPC and ZNP got two seats each.
The MNF, which ruled the state for 10 years till 2008, is the principal opposition party.