Source : Webster's Revised Unabridged Dictionary (1913)

Codification \Co`di*fi*ca"tion\ (? or ?), n. [Cf. F.
   codification.]
   The act or process of codifying or reducing laws to a code.

Source : WordNet®

codification
     n 1: the act of codifying; arranging is a systematic order
     2: a set of rules or principles or laws (especially written
        ones) [syn: {code}]