The Age reports that equine flu is the reason given to organisers. Because of the severity of the crisis, the WYD requests have been viewed as a blatant disregard for the quarantine measures in place.
Randwick trainers are still lobbying to have it moved to another location.
Racing NSW chief steward Ray Murrihy said the risk was unacceptable.
He said: "We have worked so hard to contain the virus, it's unbelievable that workmen want to come on to Randwick.
Before the EI crisis, Cummings and his fellow trainers put forward proposals to move off the track for the estimated 10 weeks the work would take but only if they were reimbursed for the costs of moving their businesses.
WYD organisers subsequently came up with a plan that would involve trainers vacating for just three days.
WYD request for Randwick upsets trainers (The Age, 20/9/07)
LINKS (not necessarily endorsed by Church Resources)
World Youth Day 2008
Australian Jockey Club
WYD as big as the Olympics: Anglican Archbishop (CathNews, 19/9/07)
WYD gifts tax deductible (CathNews, 17/9/07)
Vic govt comes to WYD funding party (CathNews, 5/9/07)
WYD registrations exceeding expectations (CathNews, 4/9/07)
WYD stays at Randwick, Premier rules (CathNews, 31/8/07)
Greens join Randwick exit chorus (CathNews, 30/8/07)
Not moving: Randwick trainers defiant (CathNews, 30/8/07)
Not too late to move WYD: Cups King (CathNews, 27/8/07)
WYD seeks Sydney harbour site for opening (CathNews, 20/8/07)
Conversions off the WYD inter-faith agenda (CathNews, 16/8/07)
WYD to showcase faith potential to unite world (CathNews, 15/8/07)
Howard, Rudd promise $15 million more for WYD (CathNews, 13/8/07)
Condoms not on for WYD (CathNews, 30/7/07)
Love in the air for WYD (CathNews, 24/7/07)
Young Christians helping WYD pilgrims get piece of action (CathNews, 19/7/07)
Open hearts to WYD pilgrims, Fisher urges Sydney (CathNews, 17/7/07)
Can't lease Randwick for WYD, trainers tell club (CathNews, 11/7/07)
Randwick no place for pope, opines Cup winner Cummings (CathNews, 10/7/07)
Pope set to come, trainers to sue over WYD (CathNews, 5/7/07)