2017 New York Laws
PEN - Penal
Part 3 - Specific Offenses
Title I - Offenses Involving Damage to and Intrusion Upon Property
Article 140 - Burglary and Related Offenses
140.10 - Criminal Trespass in the Third Degree.

140.10 Criminal trespass in the third degree.
A  person  is  guilty of criminal trespass in the third degree when he
  knowingly enters or remains  unlawfully  in  a  building  or  upon  real
  property
(a)  which  is  fenced  or  otherwise enclosed in a manner designed to
  exclude intruders; or
(b) where the building is  utilized  as  an  elementary  or  secondary
  school or a children's overnight camp as defined in section one thousand
  three  hundred  ninety-two of the public health law or a summer day camp
  as defined in section one  thousand  three  hundred  ninety-two  of  the
  public  health  law  in  violation  of  conspicuously  posted  rules  or
  regulations governing entry and use thereof; or
(c) located within a city with a population in excess of  one  million
  and  where the building or real property is utilized as an elementary or
  secondary school in violation of a personally  communicated  request  to
  leave the premises from a principal, custodian or other person in charge
  thereof; or
(d)  located  outside  of  a  city  with a population in excess of one
  million and where the building  or  real  property  is  utilized  as  an
  elementary or secondary school in violation of a personally communicated
  request  to leave the premises from a principal, custodian, school board
  member or trustee, or other person in charge thereof; or
(e) where the  building  is  used  as  a  public  housing  project  in
  violation  of  conspicuously posted rules or regulations governing entry
  and use thereof; or
(f) where a building is used as a public housing project in  violation
  of  a  personally  communicated  request  to  leave  the premises from a
  housing police officer or other person in charge thereof; or
(g) where the property  consists  of  a  right-of-way  or  yard  of  a
  railroad  or  rapid  transit  railroad  which  has  been  designated and
  conspicuously posted as a no-trespass railroad zone.
Criminal trespass in the third degree is a class B misdemeanor.