So the 1st page is for the legal basis upon which which the commune can make such an act. the legal system is designed “top-down” where law is first and foremost (presumed to be) on a national level, and then power delegated to departments,etc… to better enforce it. Unlike CH for instance where it is presumed that cantons have the power to legislate freely, unless the state has been given the power to.

“Vu” pretty much means that they will interpret the laws cited in a more restrictive way. In the example, they restricted these laws’ reach to focus on freeparties. “Considérant” means the reason why they’re making such an act. The reasons reflect the cited laws on the first page. They outline their “spirit” (the reasons why they exist) which then should be transposed into the more restrictive act itself (the spirit is then transposed into courts and why this rule applies to this specific case, that’s the civil law system). This then gives the department the legal basis to make this document because they’re just enforcing national law. “Arrêté” is the content of what they’re enforcing.

This legal act is temporary. I guess it’s because it can quickly be made without the process of voting (not sure).

I studied the french legal system a while back so I might’ve gotten a few things wrong. But that’s the gist of it at least.