Section 241.6 - Length of details(a) A detail shall be for a period of not less than 3 months and not more than 1 year, and may be extended in 3-month increments for a total of not more than 1 additional year by DoD Components and private sector organizations authorized approving officials.(b) This extension may be granted in 3-month increments not to exceed 1 year. No assignment may commence after September 30, 2018. 77 FR 36917 , June 20, 2012, as amended at 79 FR 27488 , May 14, 2014