(a) neglects, without lawful excuse, to perform any duty that is imposed on him by law or that he undertakes with reference to the burial of a dead human body or human remains, or
(b) improperly or indecently interferes with or offers any indignity to a dead human body or human remains, whether buried or not,
is guilty of an indictable offence and liable to imprisonment for a term not exceeding five years.