The government is defending the case brought by rights groups who say the law violates basic freedoms.
The former army chief beat three low-profile candidates, with the runner-up securing only 4.5%.
The blast at the African country's only oil refinery blew out the windows of local houses, witnesses say.
At least eight people have reportedly been killed and dozens wounded in the blast in Conakry.
With heavyweight matches involving former winners, BBC Sport Africa previews Groups A to C at the 2023 Africa Cup of Nations.
The former president is seeking to portray himself as the saviour of the governing party by opposing it.
Facebook
Twitter
Pinterest
Instagram
Google+
YouTube
LinkedIn
RSS