52:13D-22.2 - Timely postmark on mailed documents 

52:13D-22.2. Timely postmark on mailed documents 
     2.   Any document which is mailed shall be deemed to be timely  filed if the postmark stamped on the cover, envelope or wrapper in  which the document was mailed bears a date on or before the date  of the last day prescribed for filing the document. 

    L.1991,c.333,s.2.