Enrollment and Election Changes. Teachers will have three (3) opportunities to make TSA elections in each school year. One (1) election may be made during the May open enrollment period and will take effect September 15. Two (2) elections may be made between June 1 and April 30. Any elections made between June 1 and September 1 will take effect September 15. Salary reduction shall be accomplished on a bi-monthly basis of equal payments for the remainder of the calendar year or until a new authorization change has been requested.