4a37ba5a_apter_7___Manual_Exhibit_7_7_B__Action_to_be_Taken
[Situation] Employee is detailed or assigned outside IHS (e.g., IPA assignment) and the time in the outside organization or agency is expected to be at least 90 days. [Performance Plan] Make reasonable effort to see that a plan is given to the employee while in the outside entity. [Action to be Taken] 
Rate at time of position change if a plan had been in effect for at least 90 days. Also, the rating official will make a reasonable effort to obtain performance information from that outside assignment, especially if employee was not on an IHS plan for at least 90 days during the appraisal period. At a minimum the rating official will request a memorandum describing the assignments performed by the employee and an assessment of how well the employee performed the assignments. The IHS rating official will consider all ratings made during the appraisal period in preparing the rating of record.
Indian Health Manual (IHM) - Part 7, Chapter 7:  Manual Exhibit 7-7-B