I would like you to tell me what roads are under the Building Standards Law.

As a general rule, the site of the building cannot be built unless it is in contact with the "road" under the Building Standards Law for more than 2m. This "road" (road under the Building Standards Law) refers to the following.
1 Roads under the Road Law with a width of 4m or more
2 Those with a width of 4m or more created based on laws such as the City Planning Act and the Land Readjustment Act.
3 Those with a width of 4m or more at the time of the enforcement of the Building Standards Law (November 23, 1950)
4 Roads built without complying with the Road Law or the City Planning Act, etc., with a width of 4 m or more designated for its location
5 At the time of the enforcement of the Building Standards Law (November 23, 1950), buildings lined up along the road with a width of 1.8m or more and less than 4m (commonly known as "section 2 road") .)
※ Other than 1, there may be both public roads and private roads.

About road of Building Standard Act

I would like to check whether it is a "road where buildings can be built" (roads stipulated in Article 42 of the Building Standards Law).