Bounds on the normalization of the Friedman equation H_a0 in CSF models found by imposing a |Θ|< 0.3 limit at z < 2 and z < 10. In this family of restricted solutions, cosmological models with deficient dark energy content require H_a0 < H₀. The color map demonstrates the behavior of the Θ(z) profile at high redshifts as quantified by the difference in Θ between z = 10 and z = 2. The map shows that for every matter density parameter, there exists a unique solution for the CSF with Θ(z) = const at z > 2.