It is the single largest constituency, taking 40 out of the 90 seats in the Legislative Council.
[1] After the handover of Hong Kong, the ECC was allocated 10 seats out of the total 60 seats in the SAR Legislative Council, comprising all members of the Election Committee which also elected the Chief Executive every five years.
The size of the constituency reduced to six seats in 2000 and was entirely abolished and replaced by the directly elected geographical constituency seats in the 2004 election.
In the 2021 electoral overhaul, the Election Committee constituency was reintroduced, taking 40 of the 90 seats, almost half, of the Legislative Council with plurality-at-large voting system.
The electorate is composed of all newly expanded 1,500 members in the Election Committee.