The rules for the initial election could only stipulate rules as regards matters that concern the initial election only.
The HKPEOC which prepares these rules has no authority whatsoever to dictate anything which is concerned with the Constitution of Hong Kong.
The HKPEOC cannot order the HKP to do anything about setting up the constitution.
Only a democratically elected parliament may create a constitution.
A constitution may only become law once it passed a referendum.
Only a democratically elected parliament may call and hold a referendum.
Thank you for your attention.