The dates fixed, in any call for unpaid subscription or in any notice of delinquency and sale of stock for unpaid subscription, published according to the provisions of this Chapter, may be extended from time to time for a period of not more than thirty (30) days, by order of the board of directors entered upon the records of the corporation, but no order extending the time for the performance of any act specified in such notice is effectual unless the notice of such extension or postponement is appended to the notice to which the order relates, and is thereafter published with the notice.

SOURCE: CC § 335c.