ELECTION INFO: SECRETARY OF STATE
Phone: (601) 576-2550
Email: LScott@sos.state.ms.us
STATE-ISTICS: STATE INFORMATION

Recognized party qualifications:

Those that received more than 20% of the votes in
the previous presidential election may conduct a
primary [23-15-1081]

Primary ballot access:

1. Secretary of State
Selects nationally recognized candidates
Announcement of selection is made on or before
December 15 [23-15-1089]
2. Petition (for those not selected)
500 signatures statewide or 100 from each congressional district
File with the state executive committee of the political party
Deadline: January 15 [23-15-1093]

General ballot access for non-recognized and independent candidates:

Petition: 1,000 signatures
Deadline: 60 days before the election [23-15-785]

Last day to withdraw from the ballot: no statute
Primary date: second Tuesday in March [23-15-1081]
Voter registration:

30 days before the election; no
party registration—voters choose parties at the polls

Source:
The Reform Institute (December 2003). Presidential Ballot Access: State by State Scorecard. Retrieved November 10, 2008, from https://www.policyarchive.org/bitstream/handle/10207/5646/2003scorecard.....

Write-In Information

Write-in candidacy for President/Vice-President is not allowed, except for in the following circumstance: it is permitted only for candidates who have been nominated by a party to replace a candidate whose name was already on the ballot, due to death or resignation of the first candidate. So voters can write-in the name of that replacement candidate for President or Vice-President, if this is the case.
Source:
Frank Moore (May 8, 2008). US Presidential Write-In Candidate Requirements For Each State. Retrieved November 10, 2008, from http://www.writein2008.blogspot.com/