noun
main laws; principal legislation
Legal term referring to the primary or fundamental laws in a given area, as opposed to supplementary or subordinate regulations.
この分野の主法は、環境基本法です。
The main law in this field is the Basic Environment Law.
主法と関連法規を合わせて検討する必要がある。
It is necessary to examine the principal legislation together with the related regulations.
Compound of 主 (しゅ, 'main') and 法 (ほう, 'law'). The exact historical derivation is uncertain; the term is used in modern legal contexts.