>>212209190
I already started making an excel sheet lel.

The difference between town councils (19 of them), GRCs (33 of them - Group Representation Constituency) were confusing, it makes the most sense to treat the GRCs and SMCs as the third level.

For example, Ang Mo Kio Town Council is made up of three GRCs: Ang Mo Kio GRC, Kebun Baru SMC and Yio Chu Kang SMC.

But, officialy, as far as I understand, the constituencies (GRC+SMC) are one level below the CDC districts.