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
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
Products manufactured according to the old method are no longer on the market.
Compound of 旧 (old, former) and 法 (law, method).