N.Y.C. Admin. Code § 18-139: § 18-139 Notification prior to planting of trees.

Except as provided herein, not less than thirty days prior and not more than one hundred twenty days prior to the commencement of the planting of a tree under the jurisdiction of the department on a sidewalk that is within one hundred feet of any entrance or exit of any school or hospital, the department shall provide written notification of such planting by either facsimile, regular mail, electronic mail or by personal service to the office of the principal or designated representative of such school, or the administrator or designated representative of such hospital. Notifications pursuant to this section made by regular mail shall be placed into the United States mail not less than forty days prior to the commencement of planting of any such tree.