A grand jury may at any time examine the books and records of a redevelopment agency, a housing authority, created pursuant to Division 24 (commencing with Section 33000) of the Health and Safety Code, or a joint powers agency created pursuant to Chapter 5 (commencing with Section 6500) of Division 7 of Title 1 of the Government Code, and, in addition to any other investigatory powers granted by this chapter, may investigate and report upon the method or system of performing the duties of such agency or authority.