Normalization audit

If the conditional construction is completed, the clean normalized output is the coefficient shift

with any phase convention stated explicitly. A zero choice for an additional ${\hslash }^3$ coefficient is a truncation convention, not a coefficient derived from order-three numerator data. No normalized product is released here because ${\mathsf{T}}_2$ has not been constructed.

Higher retarded identities require higher time ordering and the relevant intermediate products. Consequently neither $R_2$ nor ${\mathsf{T}}_3$ is defined.