At my hospital we are required to float from time to time. We have "float guidelines" for those floated into and out of specialty units, and are never required to do anything we don't fell comfortable with. For the most when we go outside our specialty we function as techs, doing blood draws, IV stats, blood sugars and other treatments we're familiar with. If we float within our specialty (we have more than one unit), we function at the same level as regular unit staff. Great question! Never jeopardize your license doing something you're not competent to do!