FOUR-YEAR RULE Four Year Limit Doesn't Apply to Pre-April 1, 1984 Complaint July 31, 1998 Four-Year Rule Is Constitutional June 30, 1998 Complaint Filed Before April 1, 1984 June 30, 1998 Amount of Overcharge Limited to Past Four Years March 1, 1998 Tenant Can't Challenge Improvement Made Over Four Years Ago February 1, 1998 Tenant Can't Challenge 1985 Registration January 1, 1998 Landlord Properly Registered December 1992 Rent January 1, 1998 Four-Year Rule Applied August 31, 1997 first previous ... 8 9 10 11 12(current)