The plan is due to be sent to the Legislative Council for review on Wednesday.
A vote will then follow, possibly on Thursday at the earliest.
Chief Secretary for Administration Carrie Lam says a "no" vote will surely disappoint millions of Hong Kong citizens.
"If they reject this package, we will lose not only the chance to elect our chief executive through universal suffrage, but also the target of exploring how to elect all legislators through universal suffrage. I want to ask the opposition lawmakers: you have long been striving for a universal suffrage for both the chief executive and legislators. Now there is only one step away, will you give up it easily? Wi
