我看到cic官网上说“You must apply for a work permit within 90 days of receiving written confirmation (for example, a transcript or an official letter) from your institution indicating that you have met the requirements for completing your academic program。”请问我可不可以在拿到毕业证后的90天内申请pgwp呢?比如我是6月毕业,学签是11月过期,我是否可以在6月以后开始申请pgwp呢?