an attached engineer element is commanded by its supported unit, maintains liaison and communications with supported unit, is task organized by the supported unit, responds to support requests from its supported unit, has its work priorities established by the supported unit, has its spare work available to its supported unit, requests support from its supported unit, and receives logistical support from its supported unit. When attached, the engineer element is provided administrative and logistical support. However, some special logistical and administrative needs are still provided by the parent unit.
A unit or subcommand which is under a leader is considered to be attached to that leader, whether it got there by attaching, transferring, adding reserves or by replacement of a previous leader.