No, you may apply prior to acceptance, as long as you submit an acknowledgment of application (see question below).
Should there be any change in your admission status during the application period, it is of utmost importance that you inform us.
For PhD candidates: it is not required to be accepted to the program at the moment of submitting your scholarship application.However, it is essential to provide us with supporting documents from a professor (email exchanges, formal letter, etc) expressing their interest in supervising your research work/dissertation.