The latest development came ahead of the end of the nomination period on Friday.
The Legco election is slated for September 6.
There are reports that the chief executive could invoke emergency powers introduced during British rule to “make any regulations whatsoever which he [or she] may consider desirable in the public interest” in case of “emergency or public danger”.
Some pro-establishment figures, among them National People's Congress (NPC) Standing Committee member Tam Yiu-chung, have called for a delay in the vote in recent days, citing the novel coronavirus outbreak.
But the opposition camp – riding on its victory in last November’s district council elections – is against the idea.
Executive Council (Exco) member Ronny Tong Ka-wah said the local government could ask the NPC Standing Committee to extend the current Legco term from four years – as stipulated in the Basic Law – until the next election is completed.
Legco has 70 members - 35 directly elected by universal suffrage and the remained indirectly elected by universal suffrage.