{"id":66995,"date":"2026-09-11T08:00:13","date_gmt":"2026-09-10T23:00:13","guid":{"rendered":"https:\/\/norimen.net\/?p=66995"},"modified":"2026-09-10T23:47:34","modified_gmt":"2026-09-10T14:47:34","slug":"an-explanation-of-the-concepts-of-mandatory-and-optional-kaminoburo","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/%e3%80%8c%e6%8c%87%e5%ae%9a%e3%80%8d%e3%81%a8%e3%80%8c%e4%bb%bb%e6%84%8f%e3%80%8d%e3%81%ae%e8%80%83%e3%81%88%e6%96%b9%e3%82%92%e8%a7%a3%e8%aa%ac%ef%bc%88%e3%82%ab%e3%83%9f%e3%83%8e%e3%83%96%e3%83%ad\/","title":{"rendered":"An Explanation of the Concepts of \u201cMandatory\u201d and \u201cOptional\u201d (From the Kamino Blog)"},"content":{"rendered":"

<\/p>\n

\"\"<\/figure>\n

Hello, I'm Kamino, a civil engineer and government employee who writes a blog.<\/p>\n

One of the \"Seven Wonders\" of the construction industry: \"mandatory\" and \"voluntary.\"<\/p>\n

I think many people have a general understanding of the difference between these two, but when it comes to temporary structures in particular, almost no one can clearly explain the difference between designated and voluntary temporary structures. In some departments, they\u2019re often applied incorrectly. That\u2019s how vague these concepts are.<\/p>\n

In this section, we\u2019ll explain the official rules and why such incorrect practices have become common.<\/p>\n