The fight will form part of Xaba Promotions and Events bill on Monday next week.
Lartey has 12 knockouts in 14 wins, against two losses and a draw.
Durandt expects Lartey to be yet another acid test for Kalombo. "I expect him to bring a tough fight but again that will be to his detriment because [regarding] skills set, I think Kalombo has better and he also has power.
"Lartey's chin is tough and he has a good defence. Kalombo will have to find and make opportunities. Kalombo will display superior skills on the night; no need to go to war with a fighter who can box."
He added that winning the title will earn Kalombo the No 15 rating in Africa. "He is currently rated 38 by the WBC."
Kalombo, the soft spoken- assassin, said: "This will be my biggest opportunity to shine into the world bodies."
The boxer-fighter signed with promoter Ayanda Matiti at the beginning of this year.