The current policy is to ensure that all soldiers completing their tours of duty are thoroughly screened for their contribution to the organization and those that performed meritoriously are recommended for various types of awards that is commensurate with their exemplary service and contribution to their organization.
The Commander,  has established that all approved awards be presented before the soldier's permanent change of station (PCS)/retirement.
You don't have to wait until the soldier's PCS to submit himher for an award. If you want a soldier to be recognize for immediate significant achievement, you may recommend him/her for impact award. It will not preclude the soldier for an end of tour award, except you can no longer refer to this single act of heroismachievement that already have been previously recognized by an impact award.