Diack, an 87-year-old Senegalese, led the International Association of Athletics Federations, renamed World Athletics, from 1999 to 2015.
Semenya's inclusion is dependent on the outcome of her appeal to the Swiss Federal Tribunal.
Rune Andersen, head of the doping task force for the International Association of Athletics Federations, recommends the Federations uphold ban on Russian athletes, first imposed in 2015 over mass state-sponsored doping.
In a bid to avoid the worst of the Japanese capital's blazing summer, fans, athletes and volunteers will have to get going at the crack of dawn.
The congress is currently comprised of 27 members, including six women, according to its minimum quota.
The IAAF says Russia's athletics federation still needed to meet two criteria related to full access to doping data stored in Moscow and financial compensation, before the ban is lifted.
The Jamaican sprinter won the 100m at every world championships since 2009 apart from 2011 in Daegu when he was disqualified for a false start.
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