South Sudan became an independent country in 2011 under the terms of a peace deal that ended civil war in Sudan in 2005. Border conflicts, ethnic clashes and disputes with Sudan over oil revenue have threatened the fragile peace.
Mac Micah Deng, South Sudan's chief election officer, said the necessary legislative bodies weren't in place with just 15 months before a scheduled vote.
"The commission has not yet established a secretariat," he said in statements published Friday by the independent Sudan Tribune. "There are no high level committees established in the states to make the preparations."
Chairman of the National Bureau of Statistics Isaiah Chol Aruai said there might not be enough funds to conduct the national census necessary to move forward with 2015 elections, the Tribune reported.
Land-locked South Sudan relies heavily on oil exports for government revenue. It's been at odds with neighboring Sudan over pipeline deliveries to Red Sea ports.
South Sudanese President Salva Kiir unveiled a list of 29 Cabinet ministers and deputies last month. He fired his entire Cabinet in July in a move a government spokesman said was long overdue.
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