New York Codes, Rules and Regulations
Title 10 - DEPARTMENT OF HEALTH
Chapter II - Administrative Rules and Regulations
Subchapter G - Aids Testing, Communicable Diseases and Poisoning
Part 66 - Immunizations and Communicable Diseases
Subpart 66-2 - Immunization Against Measles, Mumps And Rubella For Post Secondary Students
Section 66-2.6 - Exclusion of susceptibles in the event of a disease outbreak

(a) In the event of an outbreak of measles, mumps or rubella in an institution, the commissioner may order the appropriate officials of the institution to exclude from attendance all students without documentation of immunity as specified in section 66-2.2(b) or (c) and those who have been excused from immunization under section 66-2.2(d) or (e) of this Subpart.

(b) The exclusion shall continue until the commissioner determines that the danger of transmission has passed or until the documentation specified in section 66-2.2(b) or (c) of this Subpart has been submitted.