1.          The sidewalks, entrances, passages, courts, elevators, vestibules, lobbies, stairways, corridors, halls, parking ramps and parking areas shall not be obstructed or used for any purpose other than ingress and egress or parking in the designated parking areas and Lessee shall not use nor permit the use or such areas for any other purpose. The halls, passages, entrances, elevators, stairways, balconies, roof, lobbies, parking ramps and areas are not for the use of the general public, and the Lessor shall in all cases retain the right to control and prevent access thereto of all persons whose presence, in the sole and reasonable judgment of Lessor, shall be prejudicial to the safety, character, reputation and interests of the Building and its Lessees, provided that nothing herein contained shall be construed to prevent such access to persons with whom Lessee normally deals only for the purpose of conducting its business on the Premises (such as clients, patients, office suppliers, equipment vendors, and the like) unless such persons are  engaged in illegal activities. No Lessee and no employees of any Lessee shall go upon the roof or in the mechanical or electrical rooms of the Building without the prior written consent of Lessor. No Lessee shall invite to the Lessees premises, or permit the visit of persons in such numbers or under such conditions as to interfere with the use and enjoyment of the public areas of the Building by any other Lessee or their employees or invitees.

3.          No sign, advertisement, notice or handbill shall be exhibited, distributed, painted or affixed by Lessee on, about or from any part of the Premises or the Building without the prior written consent of Lessor. If Lessor shall have given such consent at the time, whether before or after the execution of this Lease, such consent shall in no way operate as a waiver or release of any of the provisions hereof or of this Lease, and shall be deemed to relate only to the particular sign, advertisement or notice so consented to by Lessor and shall not be construed as dispensing with the necessity of obtaining the specific written consent of Lessor with respect to each and every other sign, advertisement or notice other than the particular sign, advertisement or notice, as the case may be, so consented to by Lessor. In the event of the violation of the foregoing by Lessee, Lessor may remove or stop the same without any liability, and may charge the expense incurred in such removal or stopping to Lessee. Interior signs on doors and the Building directory shall be inscribed, painted or affixed for each Lessee by the Lessor at the expense of such Lessee, and shall be of a size, color and style acceptable to Lessor. The Building directory will be provided exclusively for the display of the name and location of Lessee only and Lessor reserves the right to exclude any other names therefrom. Nothing may be placed on the exterior of corridor walls or corridor doors other than Building standard lettering.

4.          The sashes, sash doors, skylights, windows and doors that reflect or admit light and air into halls, passageways or other public places in the Building shall not be covered or obstructed by Lessee (except with Building standard drapes or blinds), nor shall any bottles, parcels or other articles be placed on the windowsills. Lessee shall see that the windows, transoms and doors of the Premises are closed and securely locked before leaving the Building and must observe strict care not to leave windows open when it rains. Lessee shall exercise extraordinary care and caution that all water faucets or water apparatus are entirely shut off before Lessee or Lessees employees leave the Building, and that all electricity, lights, gas or air shall likewise be carefully shut off, so as to prevent waste or damage. Lessee shall cooperate with Lessor in obtaining maximum effectiveness of the cooling system by closing drapes or blinds when the suns rays fall directly on the windows of the Premises.

5.          The toilet rooms, water and wash closets and other plumbing fixtures of the Building shall not be used for any purpose other than those for which they were constructed, and no sweepings, rubbish, rags or other substances shall be thrown therein. All damages resulting from any misuse of the fixtures shall be borne by Lessee who, or whose sublessees, assignees or any of their servants, employees, agents, visitors or licensees shall have caused the same. The cost of repair or replacement of any damage to the public or common areas of the Building, to the public facilities or to any facilities used in common with other Lessees of the Building caused by Lessee or its agents, employees, contractors or invitees shall be borne solely by Lessee.

6.          No Lessee shall mark, paint, drill into or in any way deface any part of the Premises, the Building. No boring, cutting or stringing of wires or laying of linoleum or other similar floor coverings shall be permitted, except with the prior written consent of Lessor and as Lessor may direct. Lessor may, in its sole and reasonable discretion, limit or prescribe the manner or method of painting, cutting, boring or other similar activities in, on or about the Premises in order to mitigate any adverse affect on the use or enjoyment by any invitee or visitor to the Building or any other Lessee of its premises or the Building.

7.          No bicycles, vehicles, birds or animals of any kind shall be brought into or kept in or about the Premises, and no cooking shall be done or permitted by Lessee on the Premises, except that the preparation of coffee, tea, hot chocolate and similar items (including those suitable for microwave heating) shall be permitted. No Lessee shall cause or permit any unusual or objectionable odors to be produced or permeate the Premises. Smoking or carrying lighted cigars, cigarettes or pipes in the elevator, public areas and public facilities of the Building is prohibited, except as may be otherwise posted.

8.          The Premises shall not be used for manufacturing or for the storage of merchandise except as such storage may be incidental to the permitted use of the Premises. No Lessee shall occupy or permit any portion of the Premises to be used for the manufacture or sale of liquor, narcotics or tobacco. No Lessee shall engage or pay any employees on the Premises except those actually working for such Lessee on the Premises nor advertise for laborers giving an address at the Premises. The Premises shall not be used for lodging or sleeping or any immoral or illegal purposes.

9.          No Lessee shall make, or permit to be made, any unseemly or disturbing noises or disturb or interfere with occupants of the Building, neighboring buildings or neighboring premises or those having business with them, whether by the use of any musical instrument, radio, phonograph, unusual noise or in any other way. No Lessee shall throw anything out of doors, or down or into any passage ways. Lessee shall not nor permit anything to be done in, on or about the Premises or the Building which impairs or interferes with the use and enjoyment by any other Lessee of their Premises or the Building.

10.          No Lessee, sublessee or assignee nor any of their servants, employees, agents, visitors or licensees shall at any time bring or keep upon the Premises any inflammable, combustible, explosive, toxic or hazardous fluid, chemical or substance. No acids, vapors, inflammable, combustible, toxic or hazardous materials shall be discharged into any wasteline, plumbing or vent of the Building. Notwithstanding the foregoing, Lessor acknowledges and agrees that Lessee shall be using two free inflammable agents in connection with its medical laboratory activities in the Premises. Lessee agrees to comply with all applicable environmental, fire and building safety laws and ordinances in connection with its use, storage, and disposal of such substances.

11.          No additional locks or bolts of any kind shall be placed upon any of the doors or of the Premises or the Building windows by Lessee, nor shall any changes be made in existing locks or the mechanism thereof without Lessors prior written approval. Lessee and its assignees or sublessees and their employees or agents shall not duplicate any key provided by Lessor and the same shall be marked Do not Duplicate. Additional or duplicate keys shall be obtained only from Lessor upon Lessees payment of a reasonable charge therefor. Each Lessee must upon the termination of his tenancy, restore to Lessor all keys of the Building, offices and toilet rooms, either furnished to or otherwise procured by, such Lessee and in the event of the loss of keys so furnished, Lessee shall pay to Lessor the cost of replacing the same or of changing the lock(s) opened by such lost key(s) if Lessor shall deem it necessary to make such change(s).

12.          All removals, or the carrying in or out of any equipment, freight, furniture or bulky matter of any description must take place during the hours and in the manner which Lessor may determine from time to time. The moving of equipment or other fixtures or bulky matter or any kind must be done upon prior notice to the manager of the Building and under his supervision, and the persons employed by Lessee for such work must be acceptable to Lessor. Lessor reserves the right to inspect all equipment, freight or other bulky articles to be brought into the Building and to exclude from the Building all equipment, freight or other bulky articles which violate any of these Rules and Regulations or the Lease of which these Rules and Regulations are a part. Lessor reserves the right to direct the location of any heavy article and/or to require supports or other means of distribution of the weight of such articles. In the event that Lessor shall require supports or other means of weight distribution, the costs of the same shall be borne solely and exclusively by Lessee. Lessee shall not bring into nor keep in, on or about the Premises any object which exceeds the load limit. Whether a particular object exceeds the load limit or the location of such object may be determined by a structural engineer study, the cost of which shall be borne solely and exclusively by Lessee.

13.          Lessor shall have the right to prohibit any advertising by Lessee which, in Lessors sole and reasonable opinion tends to impair the reputation of the Building or its desirability as an office location and upon written notice from Lessor, Lessee shall refrain from or discontinue such advertising. Lessee shall not advertise the business, profession or activities of Lessee conducted in the Premises in any manner which violates the spirit, letter or intent of any code of ethics or similar regulation, adopted or promulgated by any association or organization pertaining to such business, profession or activity.  Except upon Lessors express prior written approval, Lessee shall not use the name of the Building for any purpose other than that of the business address of Lessee; provided, however, that nothing contained herein shall require Lessee to submit to Lessor, for Lessors prior review, any written materials arising out of or used in connection with Lessees medical practice.

14.          Lessor reserves the right to exclude from the Building between the hours of 7:00 P.M. and 7:00 A.M. Mondays through Fridays before 9:00 A.M. and after 5:00 P.M. on Saturdays and at all hours on Sunday and legal holidays all persons who do not present a pass or card key to the Building approved by Lessor. During the non-business hours described above, Lessor may require that all persons admitted to or leaving the Building to register and/or provide appropriate identification. Each Lessee shall be responsible for all persons who enter the Building with or at the invitation of Lessee and shall be liable to Lessor for all acts of such persons. Lessor shall in no case be liable for damages for any error with regard to the admission to or exclusion from the Building of any person. In case of an invasion, mob, riot, public excitement or other circumstances rendering such action advisable in Lessors sole opinion, Lessor reserves the right, without any abatement of rent, or any other liability to Lessee, to require all persons to vacate the Building and to prevent access to the Building during the continuance of the same for the safety of the Lessee and the protection of the Building and the property in the Building. Lessor shall at all times have the right to deny access to the Building or remove from the Building any person who, in the sole reasonable judgment of Lessor or its representatives, is prejudicial to the safety, character or reputation of the Building or other Lessees of the Building.

15.          Any persons employed by Lessee to do janitorial or maintenance work shall, while in the Building and outside of the Premises, be subject to and under the control and direction of the manager of the Building (but not as an agent or servant of said manager or of the Lessor), and Lessee shall be responsible for all acts or such persons.

16.          The requirements of Lessee will be attended to only upon application to the Office of the Building.

17.          Canvassing, soliciting and peddling in the Building are prohibited and Lessee shall report and otherwise cooperate to prevent the same. Lessee and its employees, agents, invitees or representatives shall not exhibit, sell or offer to sell on the Premises or in the Building any article or thing except those essentially connected with the permitted use of the Premises.

18.          All office or other equipment shall be placed by Lessee in the Premises in settings approved by Lessor, to absorb or prevent any vibration, noise or annoyance.

19.          No air conditioning unit or other similar apparatus shall be installed or used by Lessee without the prior written consent of Lessor.

20.          There shall not be used in any space, or in the public halls of the Building, either by Lessee or either by Lessees agents, invitees or contractors, any hand trucks, except those equipped with rubber tires and rubber side guards.

21.          No vending machine or machines of any description shall be installed, maintained or operated upon the Premises without the written consent of Lessor.

22.          The scheduling of Lessee move-ins shall be subject to the reasonable discretion of Lessor.

23.          If Lessee desires telephone or other telecommunications connections, Lessor will direct electricians as to where and how the wires are to be introduced. No boring or cutting for wires or otherwise shall be made without the express prior written approval of Lessor and under the direction of Lessor.

24.          The term personal goods or services vendors as used herein means persons who periodically enter the Building of which the Premises are a part for the purpose of selling goods or services to a Lessee, other than goods or services which are used by the Lessee only for the purpose of conducting its business on the Premises. Personal goods or services include, but are not limited to, drinking water and other beverages, food, barbering services and shoeshining services. Lessor reserves the right to prohibit personal goods and services vendors from access to the Building except upon such reasonable terms and conditions including but not limited to the payment of a reasonable fee and provision for insurance coverage, as are related to the safety, care and cleanliness of the Building, the preservation of good order therein and the relief of any financial or other burden on Lessor occasioned by the presence of such vendors or the sale by them of personal goods or services to Lessee, its employees or the Premises. If necessary for the accomplishment of these purposes, Lessor may exclude a particular vendor entirely or limit the number of vendor who may be present at any one time in the Building. Lessor reserves the right to require that all personal goods or services vendors be subject to Lessors prior approval and/or registration prior to their entry to the Building.

25.          Lessor reserves the right to rescind, alter, modify or waive any Rule or Regulation of the Building promulgated herein or hereafter when in Lessors sole and reasonable judgment such rescission, alteration, modification or waiver is necessary, desirable or proper for the best interests of the Building or the Lessees therein provided that no such rescission, alteration, modification or waiver in favor of one Lessee shall operate as or give rise to such rescission, alteration, modification or waiver in favor of any other Lessee nor give rise to any liability on the part of Lessor.