The concepts of formations,
ℱ-projectors and ℱ− normalizers have all been developed for solvable Lie algebras.
In this note, for each saturated formation ℱ of solvable Lie algebras, the class 𝒯 (ℱ)
of solvable Lie algebras L in which each ℱ-normalizer of L is an ℱ-projector is
considered. This is the natural generalization of the Lie algebra analogue to SC
groups which were first investigated by R. Carter. It is shown that 𝒯 (ℱ)
is a formation. Then some properties of ℱ-normalizers of L ∈𝒯 (ℱ) are
considered.