53. The holder of a real estate broker’s certificate other than an affiliated real estate broker’s certificate shall at all times maintain security as a guarantee against the pecuniary consequences of the civil liability that he may incur by reason of any fault, error, negligence or omission committed in the course of his activities as a real estate broker or that may be committed in the performance of their duties by his employees or representatives or by persons that he has authorized to act on his behalf, whether currently or in the past.
Such security shall consist of professional civil liability insurance or, where 3 or more insurers have refused to issue an insurance contract to the certificate holder, of security in the form of an insurance policy that stands in lieu thereof.