I was aware of the municipal council elections when I was looking for Saudi data, but in my opinion this was not a qualifying dataset because the description of the dataset required “major electoral contests”. I didn’t think this qualifies because the municipal council is not part of the legislative or the executive branches of the government, i.e. parliament or cabinet. There are many ‘elected organisations’ in any given country, e.g. Chamber of Commerce, Human Rights Council, National Women Council, etc that may relate to public affairs, but in my opinion they do not fall under this dataset. This is my personal opinion, I might be mistaken.
Regarding the postcode, I was not aware of this website and I think the street and building number combination could qualify as evidence of the existence of such dataset (but it doesn’t seem to be accessible to the public). You should definitely submit this for the 2016 census here http://global.census.okfn.org/ !