The announcement was made on Saturday in the capital, Dodoma, by Ramadhani Kailima, Director of Elections at the Independent National Electoral Commission (INEC).
While defending the commission's tough stance, Kailima stressed that the code is a vital tool for ensuring fair and transparent elections at all levelsâ€"presidential, parliamentary, and local.
'The code of conduct is fundamental for guaranteeing integrity in the electoral process. All political parties were required to sign it,' Kailima stated, adding that Chadema was the only party out of 19 registered groups that refused to do so.
The code outlines expectations for ethical political behaviour ahead of the October polls, and failure to comply was previously flagged by the electoral body as grounds for disqualification.
Chadema's rejection of the code stems from its longstanding call for sweeping electoral reforms.
The party has insisted that meaningful changesâ€"such as constitutional amendments, the establishment of a genuinely independent electoral commission, and updated electoral lawsâ€"must be implemented before it agrees to participate in elections.
John Mnyika, Chadema's Secretary General, reiterated the party's "No Reforms, No Election" stance, arguing that the current framework is skewed in favour of the ruling Chama Cha Mapinduzi (CCM).
Although the government enacted limited reforms in 2024, Chadema maintains these changes fall far short of addressing systemic imbalances.
The ban marks a deepening standoff between the opposition and the state, further complicated by the recent arrest of prominent Chadema figure Tundu Lissu.
A former presidential candidate and one of the party's most vocal leaders, Lissu was detained after a public rally where he called for electoral reform.
On Thursday, the 57-year-old politician was charged with treason after being accused of inciting rebellion and attempting to disrupt the electoral process. The offence carries a potential death sentence.
Wycliffe Nyamasege
