  We establish a condition (so called generalized entropic property),
equivalent to the fact that for every algebra A from a given variety V, the set
of all subalgebras of A is a subuniverse of the complex algebra of A. We
investigate the relationship between the generalized entropic property and the
entropic law. Further, we study the identities satisfied by the complex
algebras of subalgebras of algebras from a variety V.
