N.Y.C. Admin. Code § 3-107: § 3-107 Duration and termination of emergency.

A state of emergency established under the code shall commence upon the declaration thereof by the mayor and shall terminate at the end of a period of five consecutive days thereafter, unless prior to the end of such five day period, the mayor shall either terminate such state of emergency or shall declare an additional state of emergency. Any such additional state of emergency shall commence and terminate as provided in section 3-104 and in this section.