  We discuss how the incorporation of a cosmological constant affects the
perturbative quantization of (effective) Quantum General Relativity. To this
end, we derive the gravitational Slavnov--Taylor identities and appropriate
renormalization conditions for the cosmological constant. Additionally, we
calculate the corresponding Feynman rules for any vertex valence and with
general gauge parameter. Furthermore, we provide the BRST setup and generate
the Faddeev--Popov ghost and the symmetric ghost via a gauge fixing fermion and
a gauge fixing boson, respectively. Finally, we study the transversality of the
graviton propagator and the graviton three-valent vertex.
