1. The sidewalks, halls, passages, elevators and stairways shall not be obstructed by Tenant or used for any purpose other than for ingress to and egress from the leased premises.   The halls, passages, entrances, elevators, stairways, balconies and roof are not for the use of the general public, and Landlord shall be prejudicial to the safety, character, reputation and interests of the Building and its tenants, provided, that nothing herein contained shall be construed to prevent such access to persons with whom Tenant normally deals in the ordinary course of its business unless such persons are engaged in illegal activities.  Tenant and its employees shall not go upon the roof of the Building without the written consent of the Landlord.
2. The sashes, sash doors, windows, glass lights, and any lights or skylights that reflect or admit light into the halls or other places of the Buildings shall not be covered or obstructed.  The toilet rooms, water and wash closets and other water apparatus shall not be used for any purpose other than that for which they were constructed, and no foreign substance of any kind whatsoever shall be thrown therein, and the expense of any breakage, stoppage or damage, resulting from the violation of the rule shall be borne by the tenant who, or whose clerk, agents, servants, or visitors, shall have caused it.
3. If Landlord, by a notice in writing to Tenant, shall object to any curtain, blind, shade or screen attached to, or hung in, or used in connection with, any window or door of the leased premises, such use of such curtain, blind, shade or screen shall be discontinued forthwith by Tenant.  No awnings shall be permitted on any part of the leased premises.