vacation dominican republic

How do an international student in canada applies for a vacation visa for dominican republic?
Is it possible if he does not know the exact date of departure but the approximate time?
A visa is not required for those, irrespective of nationality, holding a visa issued by Canada, any European Union member state or U.S.A, who are eligible for a Tourist Card on arrival for a stay of 30 days at a fee of US$10. An extension is possible for a stay of 90 days for a fee of DOP 62.40.
http://www.domrep.org/consulates.html ..
Dominican Republic Vacation Get-a-way









