An administrative body may take notice of general, technical or scientific facts within its knowledge, and its own records of matters pending or previously determined by the administrative body concerning the same property, the same persons or the same issues, without further proof thereof, but only if such fact or record so noticed is specified in the record or is brought to the attention of the parties before final decision, and every party is afforded an opportunity to controvert the fact or record so noticed. In like manner, and without specifying the same in the record, an administrative body may take notice of the constitution, state law, and the charter and ordinances of the city.