The Threshold Achievement Test can be administered any time beginning on or after June 15th of each year. Testing may continue throughout the year. All testing must be completed by the end of the day on May 31st of each year. Any test that has not be stopped by the test manager will automatically be stopped by the Threshold Achievement system on June 1st at midnight US Eastern Time. No testing can take place after June 1st. Phase II testing of Modules 3 and 4 will begin in late summer.