20. The members of the Corporation and any person authorized for such purpose by the Corporation shall at all times have access to all the books, registers, records and other documents of a municipality, or of any person who applies for or receives assistance from the Corporation in the form of a loan or otherwise, and may make copies thereof; they may at all times enter upon any private or public immoveable to inquire into any fact relating to the exercise of their functions. They may require from any owner, lessee or occupant of an immoveable in a municipality such assistance as is required for such purpose.