The president of the South African Federation of Football (SAFA), Danny Jordaan, promised Morocco's bid committee that he will "personally lobby" Africa's football leaders before the vote.
The ECA declined to comment last week when the 2022 World Cup expansion idea was announced on Thursday in Buenos Aires, Argentina, at a meeting of South American soccer body CONMEBOL which was attended by Infantino.
They are due to visit Marrakech, Agadir, Tangier and Casablanca.
The changes to the scoring system see infrastructure, including stadia and hotels, account for 70 per cent of the initial score given to a bid before it can qualify to enter the ballot.
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"The World Cup in Morocco would not only be a source of pride but also a great catalyst for development".
Morocco is the only nation standing alone against a joint US-Mexico-Canada bid to host the 2026 World Cup.
Joseph-Antoine Bell, a former Cameroonian worldwide football goalkeeper, has also endorsed Morocco's bid, emphasizing that Morocco has all the assets to organize a spectacular tournament.
In a media statement late March, Morocco's bid campaign head Moulay Hafid Elalamy said "it is hard to enter a race when the referee or judge is not impartial".
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He added that the visit would "strive to convey the vision of a humble, passionate, determined bid, but above all a professional and solid one".
The country was second to the United States for 1994, behind France for 1998 and just lost out to South Africa for the 2010 finals, the only time the event has been held in Africa.
BC-SOC-Russia-Racism Charge, 1st Ld-Writethru, 242 Federation Internationale de Football Association charges World Cup host Russia for fan racismEds: Updates with more quotes, details.
United 2026 is competing against a bid from Morocco, which has in recent weeks been endorsed by several European countries, including Russia, Belgium and France.
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