can tenant put up a sign on facade or inside on windows of office
building in plaze district, new york, in which office building, tenant
is occupying and leasing office space from landlord. landord has given
tenant permission to do so. is there any prohibition issued by
nyc....if administrative codes and local laws apply, site the
codes.can windows in tenant space be completely covered with signange

Encountered this one myself, maybe I can save you the cash... outside
on the facade = permit.  Inside windows would be too if physically
hung against windows, attached, or painted on.  If free standing you
can get away without as it no longer meets definition of "sign" as it
is not represented on the building proper.  See below.

http://www.nyc.gov/html/dob/html/violations/outnyc.shtml

According to the New York City Zoning Resolution, a "sign" is any
writing (including letter, word or numeral), pictorial representation
(including illustration or decoration), emblem (including device,
symbol or trademark), flag (including banner or pennant), or any other
figure of similar character that is:


Attached to, painted on, or in any other manner represented on a
building or other structure;

Used to announce, direct attention to, or advertise; and

Visible from outside a building. 


Signs are subject to the city's Building Codes and must also comply
with its Zoning Resolution (i.e. advertisement signs are prohibited in
residential zoning districts).

In order to construct or erect a sign, you must first obtain a permit.
A permit may be applied for at the Department of Buildings Borough
office in the borough where the sign will be located. A licensed
architect or engineer must submit plans to the Department of Buildings
before an application for construction of a sign can be approved.

Illuminated signs require an additional Illuminated Sign Permit that
must be renewed annually. An illuminated sign permit may be applied
for at the Department of Buildings Borough office in the borough where
the illuminated sign will be displayed.

Friend, I have zeroed on the right information you are looking for. 
It is in pdf format.  Hope pdf the reader is already with you.

SUBCHAPTER 4
REGULATIONS OF OUTDOOR SIGNS

ARTICLE 1
MAINTENANCE PERMIT FOR OUTDOOR SIGNS

26-253 ? PERMIT REQUIRED.
a. On and after a date to be provided by rule, and subject to the
provisions of section 26-258 of this code, it shall be unlawful to
place or maintain a sign, as defined in section 12-10 of the zoning
resolution, on any building or premises in zoning districts M1, M2,
M3, C6-5, C6-7 C7 OR C8 unless a permit for the maintenance of such
sign has been issued by the department pursuant to this article if,

??continued  (please click on the link to get the pdf.


BUILDING CODE OF THE CITY OF NEW YORK

It is a very comprehensive information providing all codes for
building.  Quite informative.

Title 26, Chapter 1 - Housing and Buildings

I have located the relevant portion you are looking for, which would
be available on clicking the link provided below:

Title 26, Chapter 4 Regulation of outdoor Signs

You just click on the link provided below:

Regulations of outdoor signs
Sub chapter 4 ? 26 253  to 263

http://www.nyc.gov/html/dob/downloads/bldgs_code/bc26s4.pdf


Also kindly check on the update links provided.

THE ABOVE SHOULD ANSWER ALL YOUR REQUIREMENT.


All check out the link provided by doctawood-ga ? which gives details
of violations:

http://www.nyc.gov/html/dob/html/violations/outnyc.shtml 

Hope this will be sufficient for your need.