Codification as a systematization process of including all juridical norms of a given legal branch and processing its contents, allows the elimination of old materials and the systematization of the norms of new normative acts with their specific contents. Due to the process of codification, regarded as a cleaning process similar to a legislative catharsis, appearance of the first codes in the XVII-XVIII centuries in Austria, Prussia, Spain, Portugal, Denmark and France was made possible. The Prussian Code of 1724 and Sardinia Code of 1723 can serve as examples of older codes. In our country the oldest codes were known under the title of ‘pravile’. In the present paper, the author does not aim at studying the multiple aspects concerning the codification but undertakes some attempts to answer the questions: How is codification conceived? How can ecologic legislation, in general, and the Law of the Republic of Moldova on Environment Protection, in particular, be examined as an object of codification?