Additionally, here's the "Default Policies for Stern Courses" page on the school's site:
"Arriving Late, Leaving Early, Coming & Going
"Students are expected to arrive to class on time and stay to the end of the class period.
"Arriving late or leaving class early will have impact on the course grade.
"Students may enter class late only if given permission by the instructor and can do so without disrupting the class.
"(Note that instructors are not obliged to admit late students or readmit students who leave class or may choose to admit them only at specific times.)"
"Arriving Late, Leaving Early, Coming & Going
"Students are expected to arrive to class on time and stay to the end of the class period.
"Arriving late or leaving class early will have impact on the course grade.
"Students may enter class late only if given permission by the instructor and can do so without disrupting the class.
"(Note that instructors are not obliged to admit late students or readmit students who leave class or may choose to admit them only at specific times.)"
http://www.stern.nyu.edu/AcademicAffairs/Policies/GeneralPol...