There are multiple definitions - click on the translation that matches your context.

decreto legislativo

full

delegated legislation

noun

Comparative law notes

Spain

legislation passed by the government by virtue of delegation issued by the Spanish Parliament

Definitions of delegated legislation

English

law made by statutory authorities and government departments under powers given to them by (primary) legislation to carry out the requirements of the primary legislation

The Welsh Assembly is empowered to make delegated legislation under the (UK) Government of Wales Act 1998.