The nomination process will start at 9am with the prospective candidates given an hour to submit their nomination forms. The returning officer, Azurawati Wahid, is expected to announce the names of the eligible candidates by 11am.

The candidates will have 14 days to campaign, until the eve of the polling day on Sept 28. Early voting has been set for Sept 24.

Mahkota is one of two state seats under the Kluang parliamentary constituency.

Barisan Nasional (BN) has named Kluang Umno Youth chief Syed Hussien Syed Abdullah, 40, as its candidate representing the unity government, while Perikatan Nasional (PN) picked former Johor FA footballer Haizan Jaafar, 61.

The Mahkota by-election is being held following the death of its incumbent Sharifah Azizah Syed Zain, 63, on Aug 2.

According to the Election Commission (EC), there are 66,318 registered voters eligible in the constituency, and they comprise 61,397 ordinary voters, 4,510 military personnel and spouses, 401 police, and 10 absentee voters living abroad.

The EC will open three polling centres and 11 channels for early voting, and 20 polling centres and 109 channels on polling day, with 1,126 officials to oversee the by-election.

In the Johor state elections in March 2022, Sharifah Azizah won with a majority of 5,166 votes in a four-cornered fight, with candidates from Pakatan Harapan (PH), PN, and Warisan.

This marks the 10th by-election since the 15th general election (GE15) in November 2022. The other nine by-elections were for Kuala Terengganu (parliamentary); Simpang Jeram (state); Pulai (parliamentary, Johor); Pelangai (state, Pahang); Jepak (state, Sarawak); Kemaman (parliamentary, Terengganu); Kuala Kubu Baharu (state, Selangor); Sungai Bakap (state, Penang); and Nenggiri (state, Kelantan).