what exactly are law curves and how are they used?

[MrCATIA]

with credit to Kapitan and Solid7, here's a good post from ENG-TIPS with some great explanations and examples of the Law tool:

CATIA products - mirror on a curve??

 

[MrCATIA]

more on Laws

here's a great part 2 on Laws from Kapitan:

CATIA products - Law and Sweep: Corrugated Flexible Hose