Hi,
according to the pure doctrine of EPCs, not.
The point is, that there is no function between the first event and the rule. Thus, there is not action which triggers the two different cases for the left and the right branch.
But in order to "deregulate" modeling, a connection between two events is introduced in the ARIS methodology: <event> OCCURS BEFORE <event>.
So, the answer is: according to a pragmatical approach, it is ok. According to the fundamental rules for modeling a business process, it is not.
Bye,
Frank