Official notice.

The Commissioner may take official notice of: 1. Rules, regulations, official reports, decisions, and orders of the Commissioner and of any regulatory agency of this State; 2. The contents of decisions, orders, standards or records of the Commissioner; 3. Matters of common knowledge and established technical or scientific facts; and 4. Official documents, if pertinent, when properly introduced into the record of formal proceedings by reference if: (a) Proper and definite reference to the documents was made by the party offering them; and (b) The documents are published and generally circulated so that the parties in interest are given an opportunity to examine the documents and present rebuttal evidence.