The CEF is probably one of the few priviliges from the government dedicated to Hong Kongers and citizens.  The application requirements are not strict and applicant can receive a maximum fund of HK$20,000.  Age limit is between 18 and 70.  And from 1 April 2019 onwards, there is no longer restriction on valid application period.

Anyone can access the official page to check their CEF status.  Only ID card details and date of birth will be required.  Follow this:

Notes for my future self.

for my reference (from official FAQ)