1. On or before May 15 in each year, each nontenured teaching staff member continuously employed by a board of education since the preceding September 30 shall receive either
a. A written offer of a contract for employment from the board of education for the next succeeding year providing for at least the same terms and conditions of employment but with such increases in salary as may be required by law or policies of the board of education, or
b. A written notice from the chief school administrator that such employment will not be offered.