Ten-month employees in public and higher education shall have the option of being paid bi-weekly payments during the contract or annual period, provided that such employees shall indicate their preference at the time of signing their contract for the ensuing school year and that the method of salary payment so designated shall not be changed during the period of the aforementioned contract.

14 Del. C. 1953, § ?1317; 50 Del. Laws, c. 103, § ?2; 50 Del. Laws, c. 602, § ?1; 54 Del. Laws, c. 177; 71 Del. Laws, c. 354, § ?32;