old law; former law
Refers to a law that was previously in effect, often contrasted with a new or revised law (新法).
See also: 新法
旧法では認められていたが、新法では禁止された。
It was permitted under the old law, but prohibited under the new law.
old method; former method
Refers to a previous way of doing something, often contrasted with a new method (新法).
See also: 新法
旧法に従って製造された製品は、もう市場に出回っていない。
Products manufactured according to the old method are no longer on the market.
新法 refers to a newly enacted law or method, while 旧法 refers to the old law or method it replaces.
Compound of 旧 (old, former) and 法 (law, method).