The New Jersey Constitution of 1947 (Annotated) Art. IV, § VI, ¶ 4

4. The Legislature, in order to insure continuity of State, county and local governmental operations in periods of emergency resulting from disasters caused by enemy attack, shall have the power and the immediate and continuing duty by legislation (1) to provide, prior to the occurrence of the emergency, for prompt and temporary succession to the powers and duties of public offices, of whatever nature and whether filled by election or appointment, the incumbents of which may become unavailable for carrying on the powers and duties of such offices, and (2) to adopt such other measures as may be necessary and proper for insuring the continuity of governmental operations.  In the exercise of the powers hereby conferred the Legislature shall in all respects conform to the requirements of this Constitution except to the extent that in the judgment of the Legislature to do so would be impracticable or would admit of undue delay.