The Director of Inspections may enter private property as provided in the State Housing Law at any reasonable hour of the day or night for the purpose of making a sanitary or health survey of the premises, obtaining a sample of water used thereon, collecting other data and material pertaining to public health and enforcing the Housing Law and this chapter. No person shall resist or attempt to prevent the Director from carrying out the purposes set forth in this section. However, such Director shall have in his or her possession and carry upon his or her person at all times while carrying out such duties, sufficient credentials identifying himself or herself as such Director, or showing his or her official capacity or relationship to the Building Department, which credentials shall include a picture of the bearer and a brief description of his or her appearance, indicating his or her age, height, weight, race, complexion, color of hair and eyes and sex. Such credentials shall be exhibited by the bearer on demand to any person in charge of any premises which such Director is about to enter.